Current JTRP Research

SPR-4231: MEPDG Traffic Load Spectra for Local, Minor Arterial, Major Collector, and Minor Collector Roads

Principal Investigators - Yi Jiang, Shuo Li (INDOT), Tommy Nantung (INDOT)
Start Date - 06/01/2018

The Mechanistic-Empirical Pavement Design Guide (MEPDG) has been employed for pavement design by INDOT since 2009 and has generated efficient pavement designs with a lower cost. The traffic input module in the current INDOT MEPDG pavement design procedures was developed from traffic data collected over a time period of 2000 to 2004. there is a need to utilize the recent traffic data to develop the traffic spectrum as more accurate key input for INDOT’s pavement design using the MEPDG.

SPR-4230: Alternative Quality Assurance Methods for Compacted Subgrade

Principal Investigators - Peter Becker (INDOT)
Start Date - 03/01/2018

The overall goal of this research study is to develop quality assurance procedures for DCP, LWD, and APLT that link in situ measurements with design parameters (i.e., resilient modulus).

SPR-4229: Cost Effectiveness of Constructing Minimal Shelter to Store INDOT Equipment (Weather Protection)

Principal Investigators - Ananth IyerSteven Dunlop
Start Date - 12/15/2017

Currently vehicles used by INDOT are more likely to be subject to maintenance and repair rather than replacement. The extent of wear and tear on the vehicles may be impacted by the lack of covered storage. There are many different levels of covered storage – each of which has different associated costs. The goal is to evaluate INDOT’s expected return on the investment to create covered areas for equipment (vehicles, other assets) to help reduce equipment wear, speed of startup of equipment, and perhaps better efficiency.

SPR-4228: Developing a Business Ecosystem around Autonomous Vehcile Infrastructure in Indiana

Principal Investigators - Ananth IyerSteven Dunlop
Start Date - 10/15/2017

INDOT is embarking on infrastructure planning to accommodate autonomous vehicles. This new technology affords the ability to impact economic value creation across the supply chain in Indiana well as enabling economic development in Indiana to support these emerging technologies. This proposal will be a first cut towards exploring development of a strategy to realize this potential.

SPR-4226: Cost-Effectiveness of Converting Signalized Arterials to Free-Flow Facilities

Principal Investigators - Samuel Labi, Jon Fricker, Kumares Sinha
Start Date - 12/01/2017

The study product will enable INDOT to identify, for each combination of site conditions and traffic volume, whether to maintain an existing signalized arterial or whether to convert it to a free-flow facility, and the life-cycle costs and benefits associated with each option. In cases where the preferred alternative is to maintain the status quo, the study product will also help INDOT identify the future year, if any, at which conversion to free-flow may be warranted.

SPR-4225: INDOT Research Program Benefit Cost Analysis - Return on Investment (ROI)

Principal Investigators - Bob McCullouch
Start Date - 07/01/2017

This project will analyze research projects on an annual basis from a cost benefit perspective. Results will be reported annually through an end of the year report. This analysis provides a perspective on the INDOT investment in Research.

SPR-4223: Link-Slabs Details and Material

Principal Investigators - Ghadir Haikal, Mohammad Jahanshahi, Julio Ramirez
Start Date - 03/01/2018

This research focuses on reviewing the current state-of-the-art and state-of-the-practice related to link slabs in bridge decks. Eliminating intermediate and end joints using link slabs can extend bridge service life at a fraction of cost and downtime compared to alternatives such as integral end bents. Relevant practice and other information related to design and construction of link-slab bridges will be collected and studied to inform the process of developing guidelines and design recommendation for the implementation of link slabs in Indiana bridges.

SPR-4222: Seismic Evaluation of Indiana Bridge Network and Current Bridge Database for Asset Management

Principal Investigators - Shirley Dyke, Julio Ramirez, George Mavroedis (Univ. of Notre Dame)
Start Date - 01/01/2018

The goal of this project is to evaluate the suitability of the current asset management database for performing seismic vulnerability assessment and recommend, as appropriate, any needed improvements to conduct a more robust risk-based assessment. A two-level seismic evaluation is proposed: (i) A first level screening of the bridges in the state using data already available in the asset management database; followed by (ii) A detailed evaluation of selected representative bridges. Gaps in the information that effect the ability to perform appropriate seismic vulnerability assessment will be identified. Based on the results of the two level evaluation, general retrofit strategies will also be presented.

SPR-4221: Post-Fire Assessment of Prestressed Concrete Bridges in Indiana

Principal Investigators - Amit Varma, Jan Olek, Christopher Williams
Start Date - 01/08/2018

The overall goal of this project is to develop and verify tools needed to inspect, assess, and evaluate the state of Prestressed concrete bridges in Indiana subjected to realistic fire scenarios.  The project tasks are to evaluate:  (i) the current state-of-knowledge, (ii) the effects of fire induced damage on the deterioration of concrete materials, steel strands, bond and transfer length, (iii) the effects of fire induced damage on the serviceability, strength, and structural performance of prestressed concrete bridge elements used in Indiana, and (iv) the effects of fire damage on a decommissioned INDOT prestressed concrete bridge with emphasis on deterioration of material properties, structural cracking and spalling, serviceability, and strength performance.

SPR-4219: SNIP Light

Principal Investigators - Andrew Tarko
Start Date - 09/01/2017

This project aims to increase the Safety Needs Identification Program (SNIP2) tool applicability to planning level safety analysis. This will be accomplished by reducing SNIP’s dependency on other programs, making it less resource-demanding while increasing the allowed size of road network to be analyzed. The deliverables include the modified computer tool and revised user manual.

SPR-4218: Performance of Right Turn Lane Designs at Intersections

Principal Investigators - Satish Ukkusuri
Start Date - 01/01/2018

The project will conduct a systematic analysis of safety issues related to right turn lanes at intersections. This project will obtain the crash data for various right turn lanes, identify factors that contribute to crashes at the intersections and provide recommendations for right turn lane design.

SPR-4217: Speed Management in Small Citities and Towns - Guidelines for Indiana

Principal Investigators - Andrew Tarko
Start Date - 09/01/2017

Rural arterials passing through small towns and cities pose a major safety risk due to high speeds of through traffic in areas with local and vulnerable road users. The project will deliver: 1) The effective ways to manage vehicle speeds including road design, traffic management and control, and modern technology-based solutions.  2)  Guidelines on conditions that justify use of the countermeasures including signage, markings, and speed display, limited changes in the cross-section, gateways, changes in horizontal alignment, and combinations of these countermeasures.

SPR-4216: Statistical Analysis of Safety Improvement and Integration into Project Design Process

Principal Investigators - Andrew Tarko
Start Date - 09/01/2017

This study will modify the RoadHAT tool to facilitate two additional tasks:  (1) Design support in the preliminary design stage for small and medium safety-improvement projects, and (2) Post-construction evaluation of the effectiveness of projects in improving road safety to meet the current federal requirement.  The project will deliver the modified computer tool with a revised user manual. 

SPR-4215: Rumble Stripes and Pavements Marking Delineations

Principal Investigators - Darcy BullockAyman Habib
Start Date - 01/01/2018

INDOT is seeking to identify cost effective durable pavement markings that provide good visibility during day, night, and wet conditions. Worn pavement markings reduce day and nighttime visibility, which increases driver workload and can lead to increased crashes. This project will define performance measures for pavement marking technology that can perform well over several years, improves safety, and reduces on-road maintenance time.

SPR-4213: Determining Concrete Patch Locations other than Visual

Principal Investigators - James Krogmeier, Mark Bell
Start Date - 01/01/2018

In this research, the fusion of data from two current INDOT sensors (WayLink 3D Laser Imaging and GSSI ground penetrating radar) will be investigated and methods will be developed to use them to create a patching and classification table. The proposed approach is to use the 3D imaging system to create a 1 mm resolution image of the pavement surface and develop an artificial intelligence based technique, which may allow narrowing the patch search area in order to concentrate computational and human resources for analyzing the GPR data.

SPR-4212: Structural Evaluation of Full-depth Flexible Pavement Using APT

Principal Investigators - John Haddock
Start Date - 03/01/2018

The objectives of this project include:  1. Understanding mechanical behaviors of this full?depth asphalt pavements including dense grad and SMA surfaces. 2. Verifying/calibrating/validating MEPDG rutting models (asphalt and subgrade) for the thin full?depth asphalt pavements.

SPR-4211: Implementing the Superpave 5 Asphalt Mixture Design Method and Refining the INDOT Ndesign Table, Lift Thickness, and Mixture Compactability

Principal Investigators - John Haddock
Start Date - 01/01/2018

The objectives of this project are twofold. The first is to document construction, and analyze the resulting data from 12 Superpave 5 projects to determine if any final adjustments need to be made to the Superpave 5 design method. Secondly, the team will make a search of the literature concerning asphalt mixture lift thickness and its effect on asphalt pavement mat density and make recommendations on lift thicknesses currently used by the INDOT. 

SPR-4209: Real Life Experience with Major Pavement Types

Principal Investigators - Rebecca McDaniel
Start Date - 11/01/2017

This project will examine the performance of selected pavements near the ends of their projected service lives to determine their actual life cycle and mode of failure. The intent is to investigate the true life cycle costs, accuracy of design assumptions, and the ‘weakest links’ that contribute to failure.  Appropriate changes in the structural and material designs can then be made to reduce or eliminate these failure mechanisms to prolong the pavement service lives. 

SPR-4205: Connected Vehicle Corridor Deployment and Performance Measures for Assessment

Principal Investigators - Darcy Bullock
Start Date - 11/01/2017

The project team and SAC will engage with a variety of public and private sector stakeholders to identify use cases for connected vehicle deployments and implement them on signalized Indiana corridors. Two likely deployment architectures will be considered: 1) Dedicated Short Range Communication (DSRC) and 2) Cloud based vehicle communication through factory installed telematics. Performance measures will be developed and used to assess the uses cases and deployment architectures. These performance measures will build on past traffic performance measures and extended to incorporate the new and emerging connected vehicle data.

SPR-4204: Updating Driveway and General Permit Manuals

Principal Investigators - James Handy
Start Date - 08/01/2017

Current INDOT Driveway Permit Manual will be updated to provide INDOT permitting and site designers with guidance on developing safer and efficient access to INDOT roadways. Project deliverables include ready to adopt and implement Driveway Permit Manual for INDOT including input from peer DOTs.

SPR-4203: Synthesis Study: Facilities (Enterprise Development, Sponsorship/Privatization)

Principal Investigators - Ananth IyerSteven DunlopSamuel Labi
Start Date - 12/15/2017

INDOT has the responsibility to maintain shelters and rest areas but limited budget to spend on maintenance and proper upkeep of these areas as well as provision of technological capabilities demanded by the public, in public use areas. The goal of this project is to identify use of enterprise wide resources to generate such revenue through public-private partnership agreements that best leverage use of this space.

SPR-4200: Ohio River Bridges East End Crossing, PRB, Project After Action Review of Procurement Models

Principal Investigators - Ananth Iyer, Steven Dunlop, Samuel Labi
Start Date - 06/15/2017

IFA and INDOT completed the ORB project East End Crossing as a Public-Private Partnership (P3). It is beneficial to have a quantitative understanding of the associated commitments, design choices, toll revenue forecasts, maintenance costs and estimated economic development impact associated with this project. This understanding will enable better estimates of the benefits to awarding both design and maintenance responsibility to a private provider as it better aligns incentives for higher design expenses up front by the developer. This understanding will enable appropriate structuring of future projects, including bundling and risk allocation. The analysis will also enable an understanding of contexts where public sector management of projects may be better than P3 solutions.

SPR-4167: Synthesis of Autonomous Vehicle Legislation

Principal Investigators - Sarah Hubbard
Start Date - 05/01/2017

Autonomous vehicle (AV) technologies are rapidly evolving and legislative responses to this technology have varies significantly, depending on the state.  Currently 14 states and the District of Columbia have passed legislation related to AV, and two states have executive orders.  The objective of this research is to identify and synthesize current state legislation related to AV.  A second objective of this research is to facilitate engagement with the Indiana Bureau of Motor Vehicles (BMV) and other AV stakeholders.  The results of this research will provide important information for decision makers as they develop a strategic plan for AV activities in Indiana.

This project was completed as of December 15, 2017. A final report is pending.

SPR-4165: Verification of Bridge Foundation Design Assumptions and Calculations

Principal Investigators - Rodrigo Salgado, Monica Prezzi, Daniele Perissin
Start Date - 04/14/2017

Investigation of transfer of dead and live loads through the structure of the Sagamore bridge to its pile foundations combined with detailed bridge foundation movement monitoring in order to assess current design methods and software.

SPR-4164: Blast Furnace Slag Usage and Guadance for Indiana

Principal Investigators - Whelton, Andrew
Start Date - 05/15/2017

The objective of the proposed research is to understand the extent of blast furnace slag (BFS) usage for completed INDOT projects, factors that control BFS leaching, review and recommend remediation strategies, and identify applications where future usage restrictions or sitting criteria are needed, if any. Completion of this project will equip INDOT staff with information to make decisions about future BFS usage.

SPR-4162: Incorporating Economic Resilience into INDOT's Transportation Decision-making

Principal Investigators - Konstantina Gkritza, Jon Fricker
Start Date - 05/15/2017

The objectives of this project are to develop a resilience index to better inform stakeholders of the comparative economic resilience of regions in Indiana with respect to planning the implementation of potential transportation projects and develop a spreadsheet tool for INDOT's Asset Planning & Management Division for assessing regional economic resilience and vulnerability.

SPR-4161: Implementation Proposal for (SPR-3300) Development of Methods and Specification for the Use of Inertial Profilers and the International Roughness Index for Newly Constructed Pavement

Principal Investigators - Dwayne Harris (INDOT)
Start Date - 02/13/2017

The objective of the implementation study is to provide input/insight into the development of the newly constructed pavement smoothness QA/QC verification plan. An analysis will be conducted to determine how the INDOT system data compares with the data provided by the contractor. These results will aid in the development of the validation plan. Training materials will be developed to educate INDOT project engineers regarding inertial profiling, IRI, and the specifics of the new specification.

SPR-4160: Programming of Road Projects during the Construction Season Considering Network Connectivity

Principal Investigators - Wubeshet Woldemariam, Dulcy Abraham, Kumares Sinha
Start Date - 05/01/2017

The proposed research will develop a methodology that INDOT’s construction and contracts division can use to evaluate the systemic impacts of workzones on a network. The framework and the tools will be demonstrated in the context of case studies in the LaPorte and Fort Wayne Districts. The optimal schedule developed using the methodology will be checked with projects during past years, and the methodology will be validated in terms of the reduction in user costs and other attributes which may be surrogates for the impacts on users and the community.

SPR-4158: Implementation of Continuous Improvement for INDOT Maintenance (Training and Tracking Process Improvements)

Principal Investigators - Jon Padfield
Start Date - 03/01/2017

This is a study of existing examples within INDOT and other states’ Departments of Transportation to find examples of where Continuous Improvement tools and methodology have been successfully used to solve problems and improve efficiency. This research will be shared in a series of workshops where the participants will immediately apply the underlying principles to current problems / opportunities within INDOT to make similar improvements.

SPR-4157: Quality Assurance Procedures for Chip Seal Operations Using Macrotexture Metrics

Principal Investigators - Yi Jiang, Shuo Li (INDOT), Jusang Lee (INDOT)
Start Date - 05/01/2017

Successful chip seal relies to a great extent on the qualities of asphalt emulsion binder and aggregate, proper application rate, and construction.  The proposed study aims at exploring new field tests that allow INDOT maintenance crews to implement quality assurance over chip seal jobs effectively and rapidly with respect to surface macrotexture measurement at highway speed.

SPR-4156: Capital Program Cost Optimization through Contract Aggregation Process

Principal Investigators - Jon Fricker, Samuel Labi
Start Date - 01/01/2017

This project will develop a systematic procedure for deciding whether or not to group projects, and to ascertain the consequences (in terms of cost savings) of grouping individual des numbers to form multi-des number contracts.

SPR-4155: Updating Asset Risk and Vulnerability Assessments for INDOT

Principal Investigators - Jon Fricker, Samuel Labi, J. Eric Dietz
Start Date - 12/09/2016

This study provides a Risk Assessment methodology for carrying out the following functions: (a) determine a relative ranking of INDOT critical bridges and facilities; (b) determine a relative ranking of INDOT critical assets’ vulnerability; and (c) develop countermeasures to potentially apply to critical assets. This update to a 2006 study will be applied to a selected set of bridges, and the data will be used demonstrate how an ordered ranking could be carried out on the basis of asset overall risk.

SPR-4154: Continued Support of the Mobile Infrastructure Materials Testing Laboratory

Principal Investigators - John Haddock
Start Date - 01/01/2017

The project will continue deployment of the Mobile Infrastructure Materials Laboratory (MIMTL) for use on concrete projects throughout Indiana, at both the state and local agency levels.

SPR-4153: INDOT Highway Lighting Support Services

Principal Investigators - Robert Kramer
Start Date - 12/01/2016

This project will provide technical support, testing services, and analysis regarding the design and options for the implementation of LED and other solid state based highway lighting. The Energy Efficiency and Reliability Center (EERC) will support development of the testing and evaluation program. A written report of results will be provided upon completion of field testing.

SPR-4151: Synthesis Study: Overview of Readily Available Culvert Inspection Technologies

Principal Investigators - Joseph Sinfield
Start Date - 01/01/2017

This Synthesis Study will enhance awareness of existing methods to facilitate in?situ inspection of small to medium culverts. Specifically, two work streams will be pursued to realize thisobjective:

  1. Conduct a thorough review of off?the?shelf technological solutions that are readily available to assess culvert structural integrity and function
  2. Develop recommendations for field trial of high potential technologies that could determine their appropriateness for culvert inspection settings in the State of Indiana

SPR-4126: Implementation of LiDAR-Based Mobile Mapping System for Lane Width Evaluation and Reporting in Work Zones for INDOT Traffic Management

Principal Investigators - Ayman Habib
Start Date - 10/17/2016

Maintaining lane width at a minimum of 10ft in work zones is essential for preventing unanticipated congestion in work zones. This project will focus on implementing a LiDAR Based Mobile Mapping system for lane width evaluation and reporting in work zones.

SPR-4123: Strategic and Tactical Guidance for the Connected and Autonomous Vehcicle Future

Principal Investigators - Satish Ukkusuri
Start Date - 01/01/2017

Automated vehicle (AV) and Connected vehicle (CV) technologies are rapidly maturing and the timeline for their wider deployment is currently uncertain. The objectives of this research are: (1) Synthesize the existing state of practice and how other state agencies are addressing the pending transition to AV/CV environment; (2) Estimate the impacts of AV/CV environment within the context of (i) traffic operations – impact of headway distribution and traffic signal coordination; (ii) Traffic control devices and (iii) roadway safety in terms of intersection crashes and (3) provide a strategic roadmap for INDOT in preparing for and responding to potential issues.

SPR-4122: Repair and Strengthening of Bridges in Indiana Using Fiber Reinforced Polymer (FRP) Systems

Principal Investigators - Christopher Williams, Robert Frosch
Start Date - 01/01/2017

The application of fiber reinforced polymer (FRP) has been identified as a cost-effective strengthening and repair technique for concrete bridge components with potential for long-term cost savings. To ensure successful implementation of FRP systems, INDOT needs assistance to determine the most suitable applications of FRP, establish proper installation techniques, and verify the increase in strength and/or stiffness provided by the material. The proposed research will result in a guidebook and recommended specifications to aid in the application of FRP.

SPR-4121: Pack Rust Identification and Mitigation Strategies for Steel Bridges

Principal Investigators - Mark Bowman
Start Date - 01/01/2017

The proposed research will study the development of pack rust in Indiana steel highway bridges and investigate possible repair methodologies. Specific areas of interest are the frequency of occurrence of pack rust in steel highway bridges in Indiana, locations and types of bridges where pack rust has been observed to occur, and repair or mitigation procedures that have been developed and implemented in other state DOTs and other industries.

SPR-4120: Strength Assessment of Older Continuous Slab and T-beam Reinforced Concrete Bridges

Principal Investigators - Ghadir Haikal, Julio Ramirez
Start Date - 12/01/2016

The goal of this project is to provide an improved methodology for the load rating of flat-slab and T-beam reinforced concrete bridges in Indiana. An assessment of the impact of three-dimensional analysis on load rating, compared with conventional load rating methodologies and recommendations for bridge classification and rating will be presented.

SPR-4119: Assessment of Bridges Subjected to Vehicular Collision

Principal Investigators - Ashley Thrall
Start Date - 01/01/2017

The aim of this project is to understand the impact of vehicular collision on the behavior and load carrying capacity of slab-on-steel-girder bridges. Research will include (1) performing non-destructive field testing using Digital Image Correlation, (2) developing validated numerical models, and (3) performing parametric investigations to extend results to other loadings and bridge geometries. Research will culminate in analysis recommendations and assessment guidelines for bridge inspectors to evaluate damaged bridges for repair.

SPR-4116: Investigation of Design Alternatives for the Subbase of Concrete Pavments

Principal Investigators - Marika Santagata, Philippe Bourdeau
Start Date - 01/01/2017

The study will develop recommendations for new subbase designs based on a comprehensive review of the literature, a survey of best practices across the US and abroad and an experimental program focused on unstabilized layers alone and in combination with geotextiles.

SPR-4115: Investigation of Delta Tc for Implementation in Indiana

Principal Investigators - Rebecca McDaniel
Start Date - 11/01/2016

A new concept for indicating binder aging?related cracking (e.g., block cracking) using the Bending Beam Rheometer (BBR) is gaining favor around the country. This new procedure is especially relevant for asphalt mixes containing recycled materials (RAP and/or shingles). This project will review the Delta Tc concept for improving cracking performance of Indiana’s pavements. Proposed deliverables include a recommendation regarding implementation and a draft Indiana Test Method.

SPR-4114: Performance Balanced Mix Design for Indiana's Asphalt Pavements

Principal Investigators - Jusang Lee (INDOT), John Haddock
Start Date - 01/01/2017

Several performance-balanced mix design (BMD) methods are available. There project will validate them with Indiana mixture and pavement conditions. A primarily project deliverable is a draft ITM of BMD.

SPR-4113: Development of a Friction Performance Test for Compacted Asphalt Mixtures

Principal Investigators - Rebecca McDaniel, Jan Olek
Start Date - 10/01/2016

Friction is important to assure safety for the traveling public. This project will predict pavement friction from small samples (cores or gyratory specimens) to predict friction for use as a mix design check and/or a construction quality parameter. A current ITM to approve new aggregate sources for field test sections (ITM 221) requires the fabrication of large slabs and is not feasible for use on small specimens. The deliverables include a draft ITM for a friction test method for small samples with associated data to support the method; and a draft performance?based specification for asphalt pavement friction.

SPR-4112: Best Practices for Patching Composite Pavements

Principal Investigators - Rebecca McDaniel
Start Date - 10/17/2016

Patching composite and, to a lesser extent, concrete pavements poses numerous constructability and performance issues. A synthesis of research and experience is needed to identify ways to facilitate proper construction and improve the ultimate performance of these patches. Developing these best practices will involve a survey of other states’ practices, literature review and review of INDOT pavement management data before and after patching on selected projects in each district.

SPR-4109: Improvement of Stiffness and Strength of Backfill Soils through Optimization of Compactions Procedures and Specifications

Principal Investigators - Monica Prezzi, Rodrigo Salgado
Start Date - 01/01/2017

The main goals of this project are the development of specific guidelines for effective compaction of backfill materials of different gradations and the modification of INDOT specifications to include the vibration frequency, amplitude, moisture content and lift thickness required to compact in the field backfill materials of different gradations.

SPR-4108: Development of Comprehensive CPT-Based Geotechnical Design Manual for Indiana Transportation Infrastructure

Principal Investigators - Monica Prezzi, Rodrigo Salgado
Start Date - 01/01/2017

The main goal of this project is the development of a comprehensive CPT-based geotechnical design manual for site exploration, interpretation of soil behavior, and design of shallow/deep foundations, embankments and retaining walls in Indiana. Currently, geotechnical designs are carried out using soil strength and stiffness parameters that are obtained from time-consuming and relatively expensive laboratory tests. Since the CPT is an in situ test, the manual will provide the basis for INDOT engineers to use CPT results directly for the assessment of site conditions and the design of geotechnical projects in the future.

SPR-4107: Subgrade Stabilization Alternative

Principal Investigators - Antonio Bobet
Start Date - 04/01/2017

Subgrade stabilization in the INDOT current standard specification is limited to the selection of materials type rather than strength and properties of the treated soil. With the adoption of the Mechanistic Empirical Design Guide, it is possible to consider in the input parameters the actual properties of the stabilized soil subgrade. The research addresses this issue by exploring the engineering properties of subgrade stabilization alternatives, so pavement engineers can design the pavement structure accordingly.

SPR-4105: Outsourcing of Laboratory Testing and Inspection Activities at State Highway Agencies: Synthesis of Current Practices

Principal Investigators - Dulcy Abraham
Start Date - 03/01/2017

This synthesis study will conduct a review of current inspection and testing practices used by State Highway Agencies in the United States and internationally to determine where INDOT should place its resources within testing and inspection to get the best value.

SPR-4104: Predicting Impact to Traffic Safety and Mobility of Change in Speed Limits for Indiana Freeways

Principal Investigators - Andrew Tarko
Start Date - 08/15/2016

The study will estimate the safety and mobility effects of removing the differential speed limits on rural freeways and raising the speed limits on urban freeways from 55 mph to 60 or 65 mph. It is also possible that the research will confirm the current policy of differential speed limits on rural freeways and the single speed limit on urban freeways as optimal.

SPR-4103: Developing the Collision Diagram Builder - Phase II

Principal Investigators - Andrew Tarko
Start Date - 08/15/2016

The proposed project will expand the existing Collision Diagram Builder to make it useful for crash pattern analysis at the corridor level with multiple major and minor intersections and segments. The expanded CDB will place crashes at major and minor intersections with driveways and on segments between the intersections. Another proposed improvement will allow for display of traffic conflicts, or “close calls”, at intersections in the same manner as collisions are. In addition, a module will be developed to properly format data input to the CDB from the Traffic Safety Portal currently under development at INDOT.

SPR-4102: Building, Evaluating, and Improving LiDAR-based Traffic Scanner Prototypes for Implementation to INDOT Practice - Phase II

Principal Investigators - Andrew Tarko, Mario Romero, Kartik Ariyur
Start Date - 08/15/2016

The LiDAR-based system - TScan - addresses the need for fully automatic collection of comprehensive intersection data and analyzing these data where costly human observers or hybrid techniques (machine + human) are used. The proposed Phase II will develop a prototype unit to be evaluated and used by INDOT. An integration algorithm will be developed to enable use of two TScan units to cover large intersections with wide medians and channelization islands. Furthermore, proposed incorporation of traffic signals into the TScan results will help analyze signalized intersections.

SPR-4101: Pavement Materials Testing and Testing Intervals Confidence in Pavement

Principal Investigators - Hubo Cai, Hyonho Chun
Start Date - 07/01/2016

This project aims to develop statistical analysis tools to correlate the materials testing procedure, the consistency in pavement measurement, and the risk of accepting inferior pavement. An economic study will also be conducted to help INDOT determine the optimal testing method, sampling frequency, spatial interval, and sampling location.

SPR-4100: Maximum Allowable Deflection by Light Weight Deflectometer and Its Calibration and Verification

Principal Investigators - Shuo Li, Yi Jiang
Start Date - 06/01/2016

INDOT has established deflection criteria for compaction control of chemically modified soils, and aggregates over the modified soils. However, these criteria do not cover Type IC and II subgrades and require construction of a test section.  These criteria were derived from one LWD model only. Evaluation of LWDs from various manufacturers is necessary for maintaining a quality control process. This project will develop deflection criteria for constructions in small areas for different LWD models and establish harmonized procedures for LWD calibration and verification.

SPR-4044: Evaluating Opportunities to Enhance the Hoosie State Train Ridership through a Survey of Riders' Opinions and an Assessment of Access to the Line

Principal Investigators - Konstantina Gkritza
Start Date - 08/15/2016

This project will evaluate the opportunities to enhance the Hoosier State train ridership through a survey of riders’ opinions and an assessment of access to the line. The project results can be implemented to evaluate the effectiveness of the changes in services the past year, assess the potential impact on ridership of future planned improvements of the services, and provide insights into the groups of people that would be more likely to ride the train to inform future marketing efforts.

This project was completed as of December 13, 2017. A final report is pending.

SPR-4043: Investigation of Materials from Premature Failures in Pavement and Bridges

Principal Investigators - Jan Olek
Start Date - 02/01/2016

The Indiana Department of Transportation (INDOT) is experiencing premature failures in some segments of asphalt pavement. This study will involve evaluation of the aggregate extracted from the investigated pavements in order to determine their mineralogical composition and to provide a semi-quantitative data on the amounts and types of aggregates used in construction of the pavements in question.

SPR-4040: Experimental Study of the Load Response of Large Diameter Closed-Ended and Open-Ended Pipe Piles Installed in Alluvial Soil: Phase I

Principal Investigators - Monica Prezzi, Rodrigo Salgado
Start Date - 08/01/2015

For the first time, INDOT is planning to use 24-inch open-ended pipe piles and closed-ended piles to support the piers and bents for the east-bound U.S. 52 bridge over the Wabash River. Open-ended pipe piles are easier to install, particularly in Indiana soils of glacial origin. This project aims to advance this knowledge through load-testing of an open-ended pile in connection with this bridge replacement project.

SPR-4017: Implementation of Weight in Motion Data Quality Control and Real-Time Dashboard Development

Principal Investigators - Darcy Bullock
Start Date - 03/01/2016

This project will implement real-time QA/QC of the data both for existing INDOT WIMs and proposed systems. The objectives of this study are to improve the quality of WIM data used for pavement design and Increase use of WIM technology by ISP to reduce overweight trucks violations and increase pavement life.

SPR-4016: Assessment of Alternative Rumble Stripe Construction

Principal Investigators - Darcy Bullock, James Krogmeier
Start Date - 03/01/2016

Sinusoidal rumble strip milling techniques can provide a continuous recess for the pavement marking that would place it below the plow blade and is reported to provide effective lane departure warning, but with lower noise. This project will conduct an empirical evaluation of alternative widths, sinusoidal periods and milling depths to identify a set of construction specifications that can provide adequate lane departure warning with lower noise outside of the right-of-way.

SPR-4015: Systemic Safety Countermeasures Decision Guide and Updating the Indiana Crash Reduction Factors

Principal Investigators - Andrew Tarko, Mario Romero
Start Date - 08/15/2015

The study aims to update and expand the Crash Reduction Factors (CRFs) and develop an Indiana Safety Calculator to support INDOT’s scoping and preliminary design via convenient implementation of the CRFs. The Safety Calculator will help generate simpler yet more cost-effective projects in a shorter time and promote better decisions about safety projects.

SPR-4012: Effects of Bridge Surface & Pavement Maintenance Activities on Asset Rating

Principal Investigators - Samuel Labi, Kumares Sinha
Start Date - 10/15/2015

The study will enable INDOT to ascertain the impacts of different M&R treatments to the bridge wearing surface and pavements. The research product will be numerical statements (expressed in terms of appropriate performance indicators) (a) average, (b) minimum, maximum, and standard deviation, (c) probability distribution, (d) a statistical model, and (e) sensitivity charts. The numerical statements will serve as default reset values for purposes of “what-if” analysis. That way, the post-treatment level of performance can be predicted. Implementation is expected to occur in the use of INDOT’s asset decision making and programming software packages, as well as pavement design processes.

This project was completed as of November 27, 2017. A final report is pending.

SPR-4009: Concrete Box Beam Risk Assessment & Mitigation

Principal Investigators - Robert Frosch, Christopher Williams
Start Date - 01/01/2016

Adjacent prestressed box beam bridges account for a large portion of Indiana’s bridge population. The objective of this research is to develop recommendations for inspection, load-rating, and design of adjacent box beam bridges. This research program will propose revisions to INDOT’s Bridge Inspection Manual for assessing the condition ratings for adjacent box beam bridges and determining their load capacity. In addition, a “best-practices” document will be developed for use by engineers for the design and construction of the next generation of box beam bridges.

SPR-4007: Implementation of Risk-Based Bridge Inspection

Principal Investigators - Robert Connor
Start Date - 01/01/2016

This project will provide implementation assistance based on the findings of SPR 3653, which identified that INDOT could benefit by the implementation of risk-based inspection (RBI) methodologies as related to setting bridge inspection intervals and scope. The ultimate goal is to move INDOT’s bridge inspection cycle from a calendar or time only based interval to one that incorporates risk into the inspection frequency decision.

SPR-4005: Warranty Utility Cut Repair (QC/QA of Utility Cut Repair)

Principal Investigator - Dulcy Abraham
Start Date - 01/01/2016

This policy-based study is expected to lead to the development of strategies or the adaptation of current INDOT utility cut repair practices to require utilities in Indiana to guarantee the condition of pavement repairs for a specified period of time. Proposed deliverables include:

  1. Guidance/specification on utility cut repairs
  2. Field inspection guidance
  3. Database management system for the identification of the utility for re-patching ‘defective’ utility cut repairs.

SPR-4004: Development of Subgrade Stabilization and Slab Undersealing Solutions for PCC Pavements Restoration and Repairs

Principal Investigators - Jan Olek
Start Date - 07/01/2016

Project deliverables will include protocols for proposed stabilization and slab undersealing techniques that will be in the form suitable for implementation in INDOT’s specifications. In addition, the proposed field trials of the proposed solutions will provide a credible set of information that will help with the implementation efforts.

SPR-4003: Improving the Quality of Concrete for INDOT Projects

Principal Investigator - Jason Weiss
Start Date - 07/01/2016

The project will be conducted at Oregon State University and includes two components:

  • Implementing rapid durability measure on concrete (resistivity; formation factor)
  • Evaluating internal curing for other PCC beyond High Performance

SPR-4002: Risk-based Specification for Construction

Principal Investigator - Hubo Cai, Dulcy Abraham, Mark Bowman
Start Date - 12/01/2015

The goal of this project is to develop alternative inspection strategies for construction work to ensure the quality of the results. This study aims to develop 1) a risk model to quantify the risks associated with various testing and inspection strategies, and 2) a risk-based and performance related specification for construction inspection. The new specification will enable INDOT to allocate its limited resources to the riskiest areas and adapt its QA program based on contractor’s performance, while minimizing the risk to INDOT.

SPR-3946: Improving Energy Efficiency of Facilities

Principal Investigator -James Handy
Start Date - 09/01/2015

INDOT maintains over 300 facilities statewide. Many existing facilities are considered high energy users due to their age and the type of fixtures and equipment utilized within the facility.  This project will conduct energy assessments on six existing buildings and make recommendations for improvements for reducing energy costs for electric and gas.

This project was completed as of October 4, 2016. A final report is pending.

SPR-3916: Scour Protection Determination for Small Culverts

Principal Investigators -Venkatesh Merwade, Dennis Lyn
Start Date - 01/01/2015

The main objective of this proposal is to propose a more appropriate procedure for riprap design that takes into consideration more flow variables than just the outlet velocity. This objective will be accomplished through modeling and laboratory experiments. The project deliverables are (a) a thorough literature review and comparative analysis of riprap design from neighboring state agencies and HEC-14; and (b) a report detailing the scope of the study, methodology and the findings with regard to various riprap designs and their behavior; and (c) draft design recommendations for the Indiana Design Manual based on the findings of this project.

SPR-3915: Implementing Effective Retrofits In Selected Steel Bridge Details

Principal Investigator - Robert Connor
Start Date - 9/01/2014

Development and implementation of effective retrofits in steel bridges is an essential part of INDOT’s asset management program. Ineffective retrofits can lead to costly repairs. Incorrect retrofit selection or execution may also result in worse conditions than had the retrofit not been attempted. Based on the latest research and national experience, improved retrofit methods have been developed for retrofitting common problems, which will be the focus of the training developed and provided by this project.

SPR-3914: LIfe Cycle of Steel vs. Concrete

Principal Investigator - Mark Bowman
Start Date - 8/15/2015

A life cycle analysis is proposed that will examine steel and concrete bridges for different spans and bridge types.  Recommendations will be formulated for designers to consider when developing bridges with optimal life cycle costs.

SPR-3913: The Assessment of Legal and Proposed New Permit Loads on Bridge Rating and Posting Policies to COMLPL with Latest AASHTO and MBE Guidelines

Principal Investigators - Mark Bowman, Arun Prakash
Start Date - 01/01/2015

The proposed research work will address two needs. First, it will review legal loads in Indiana to determine if they encompass the truck loads that are commonly allowed to use the state and local bridge system. These loads must satisfy the requirements prescribed by AASHTO in the MBE and, if not, then to develop state recommended legal loads that would satisfy the AASHTO requirements. Second, it will also examine the influence of permit loads on load rating of Indiana bridges, including both the Michigan train loadings as well as the newly proposed 120,000-lb permit truck.

SPR-3912: Economic Development Impact of Corridor Improvements

Principal Investigators - Konstantina Gkritza, Jon Fricker
Start Date - 10/01/2014

This study will develop a sketch-planning tool to assess the economic development impact of (non-traditional) corridor improvements. Examples of such improvements and treatments include (but not limited to): ITS implementation strategies; access management; road diets; HOV lanes; reversible lanes etc. The research team will:  1) investigate the synergies among travel demand, traffic, and economic impact models in evaluating alternative corridor-level projects.  2) investigate ways to adapt the ISTDM, and/or MCIBAS, or develop a post-processing method to meet the needs of INDOT’s Division of Asset Planning and Management.


SPR-3905: Concrete Patching Materials and Techniques and Guidelines for Hot Weather Concreting

Principal Investigators - Jason Weiss, Pablo Zavattieri, Jan Olek
Start Date - 9/01/2014

The focus of this study is to improve the performance and predictability of patching materials with high early strength and long term durability. By improving the predictability and performance of these materials INDOT can reduce costs (due to traffic control and risks associated with liquidated damages) to reduce the cost of construction.

SPR-3904: Tack Coat Installion Performance Guidelines

Principal InvestigatorRebecca McDaniel, Jusang Lee (INDOT)
Start Date - 01/01/2015

This research will explore options for tack coat quality acceptance tests and processes. The deliverables will include a draft Indiana Test Method draft standard specification and if needed, calibration factors for MEPDG interface bonding inputs.

SPR-3903: Fog Seal Performance on Asphalt Mixture Longitudinal Joints

Principal InvestigatorJohn Haddock
Start Date - 01/01/2015

This project will provide a better understanding of fog seals used on the longitudinal joints of asphalt pavement surface mixtures. Specific project deliverables are a quantification of the life of such fog seals, a determination of the proper material to be used and if they must be periodically reapplied, and a better understanding of how these seals affect pavement markings.

This project was completed as of November 6, 2017. A final report is pending.

SPR-3902: Performance Acceptance and Performance Monitoring of Pavement Using Falling Weight Deflectormer (FWD) and International Roughness Index (IRI)

Principal Investigators - Tommy Nantung (INDOT), Hyonho Chun, Richard Ji (INDOT)
Start Date - 01/01/2015

The objectives of this research project are geared toward determining a practical solution in INDOT pavement acceptable structural performance limits and to construct pavement structural performance curves/models for scoping, design, and preservation purposes. The ultimate goal of the research is to review the structural and functional performance of selected pavement sections and provide the Department with better practical tools for pavement engineers during scoping, design, construction, and maintenance processes.

SPR-3865: Traffic Ware Valence Pod Detection System INDOT Evaluation

Principal Investigator - Darcy Bullock, Stephen Remias
Start Date - 12/01/2014

The objective of the research project is to determine the performance of the Trafficware Valence Pod Detection System as both stop bar and advanced detection.

SPR-3861: Quantiying the Benefit of Bonus/Deduct Factors on Asphalt Pavement

Principal InvestigatorMakarand Hastak, Tommy Nantung (INDOT), Jusang Lee (INDOT)
Start Date - 02/01/2015

Research is needed to evaluate HMS QC/CA pay factors in terms of pavement performance.  This study will allow INDOT to understand a correlation between the current pay factors and pavement performance.  Reduced cost, longer pavement service life and improved performance are potential benefits of implementation of this research deliverables.

SPR-3857: Assessment of Pipe Fill Heights

Principal Investigators - Antonio Bobet, Tommy Nantung (INDOT)
Start Date - 02/15/2014

INDOT requires calculations to determine the minimum and maximum cover height of pipes. The following types will be considered: corrugated HDPE, steel, galvanized and spiral-bound pipes. The scope of the work consists of the review of earlier analyses and the completion of new calculations.  Deliverables will be in the form of tables that provide the maximum and minimum fill cover for the different types of pipes.

SPR-3856: INDOT-JTRP Project/Program Implementation Improvement

Principal Investigators - L. David Snow, James Handy
Start Date - 01/19/2014

The goal of this project is to improve the process for implementation, tracking and validation of the INDOT?JTRP projects/program and accelerate the implementation of INDOT?JTRP project findings/recommendations. The value stream mapping process will be used to identify opportunities for improvement for FY 2015 and to develop an overall future state map for improving the number of projects successfully implemented.

This project was completed as of July 17, 2015. A final report is pending.

SPR-3827: Stragetic Scheduling of Infrastructure Maintenance and Rehabilitation

Principal Investigators - Jon Fricker, Samuel Labi, Kumares Sinha
Start Date - 03/01/2014

It is anticipated that the agency will use results of this study to enhance its decisions with regard to four key elements of asset management: determine the optimal timing of specific treatments for bridge and pavement preventive maintenance and rehabilitation (M&R); establish cost-effective long-term M&R schedules (treatment types and their respective timings) over asset life cycle; quantify the consequences of delayed M&R; develop network-level performance measures for purposes of benchmarking its overall performance vis-à-vis those of other state agencies.

This project was completed as of July 25, 2017. A final report is pending.

SPR-3821: Real Time Traffic Mobility Measures

Principal Investigator - Darcy Bullock
Start Date - 04/01/2014

This project integrates real-time data into the Traffic Management Center operations and develops a series of real-time dashboards that can be utilized by technicians, engineers, planners, and developers to manage real-time traffic. The dashboards consist of a work zone assessment dashboard, an incident detection dashboard, and an interstate mobility dashboard.  In addition to real-time dashboards, the data will continue to be used to produce subsequent versions of the Indiana Mobility Report series to assist in the prioritization of capital and operations investments.

SPR-3820: Probability of Detection (POD) Study for Bridge Inspection Related to Steel Bridges

Principal Investigator - Robert Connor
Start Date - 8/1/2013

The probability of bridge inspectors to detect and quantify various defects and forms of damage, such as weld toe cracks, surface corrosion, and internal weld flaws, will be evaluated in this study. The influence of environmental conditions on detectability will also be studied, such as the influence of conducting inspection during nighttime, cold weather, etc. The outcomes will be used to develop procedures to improve inspection reliability, develop inspector performance-based certification criteria and procedures, and develop pin inspection and testing procedures.

SPR-3816: Bridge Load Rating

Principal Investigator - Mark Bowman
Start Date - 1/1/2014

Based upon the review and assessment, a load rating procedure will be proposed for bridges that do not have plans. Three bridges in the INDOT state system will be selected for more extensive evaluation. This will include a detailed structural analysis and a load test to assess the condition of the bridge structure. Bridge structures of interest are earth-filled concrete arch bridges and buried concrete box and corrugated steel arch bridges.

SPR-3815: Establishing Modeling Standards for Bridges and Culverts

Principal Investigator - Venkatesh Merwade
Start Date - 1/1/2014

The main objective of this project is to develop an objective way of selecting a bridge or culvert for a given waterway crossing project. This objective will be accomplished through a combination of data analysis, computational modeling and laboratory studies. The project deliverables include a literature review of culvert and bridge design as documented in FHWA design manuals and HEC-RAS and a report detailing the scope of the study, methodology and the findings to help agencies objectively select bridge or culvert design for a given project.

SPR-3808: Synthesis: Accelerating the Implementation of Research Findings to Reduce the Potential Concrete Pavement Joint Deterioration

Principal Investigators - Jan Olek, Jason Weiss
Start Date - 01/01/2014

This project will comprehensively review and synthesize all the suggested causes and phenomena associated with joint deterioration for purposes of developing a manageable solution to prevent and/or to mitigate this problem in the future.

SPR-3807: Investigating the Need for HMA Drainage Layers

Principal Investigators - John Haddock, Pablo Zavattieri
Start Date - 04/01/2014

The objective of this project is to determine if flexible pavements without HMA drainage layers can perform as well, or better as flexible pavements containing them.  Project deliverables include: updated hydraulic properties of current INDOT HMA materials; model of moisture migration in flexible pavements; results indicating if newer specifications better inhibit moisture migration; and a plan for long?term monitoring of the instrumented pavement sites.


SPR-3800: Development of a Geographic Winter-Weather Severity Index for the Assessment of Maintenance Performance

Principal Investigators - Michael Baldwin
Start Date - 01/11/2014

Effective and efficient removal of snow and ice from public roadways is a key outcome for winter maintenance. This project will develop a weather severity index that connects relevant weather?related variables to traffic?related variables. This will require classification of weather by type of event, such as wet snow, snow squalls, lake effect, freezing rain, frost. Geographic data sets of winter weather severity will be produced using detailed meteorological observations. A database will be delivered that contains the severity index, weather?related variables, and numerical predictions of the severity index statewide, on an hourly basis.

This project was completed as of July 17, 2015. A final report is pending.

SPR-3717: Streambank Stabilization Alternatives to Riprap

Principal Investigator - Dennis Lyn
Start Date - 1/1/2013

This project will identify and characterize techniques that can be used to stabilize streambanks in an environmentally sensitive yet cost-effective manner. This project will review the relevant literature and assess the performance of approaches previously taken at various INDOT sites as the basis for providing guidance in the choice of the context-dependent best technique(s). Results will provide the basis for updating the relevant portions of the INDOT design manual and standard specifications.

This project was completed as of August 10, 2015. A final report is pending.

SPR-3715: CAI/S-BRITE (Steel Bridge Research, Inspection, Training and Education Center): Preliminary Engineering Design

Principal Investigator - Robert Connor
Start Date - 10/1/2012

This proposal is for preliminary engineering design fees associated with the development of the property for the Center for Aging infrastructure S-BRITE Center.

SPR-3711: MEPD Implementation (Validation/Model Calibration/Acceptable Distress Target/IRI Failure Trigger/Thermal Selection/binder Selection) and Climatic Data Generation

Principal Investigator - Tommy Nantung (INDOT), Jusang Lee (INDOT), Bob McCullouch
Start Date - 7/1/2013

The goal of this project is refinement of the INDOT MEPDG design procedure to match Indiana's conditions and parameters more closely. The following objectives are established to meet this end goal:

  1. Review the performance criteria in MEPDG and establish new pavement design performance criteria.
  2. Verify and validate the performance models in MEPDG and eliminate remaining conservative pavement design criteria.
  3. Assure that the current INDOT policy regarding the Superpave asphalt pavement guidelines supersedes the asphalt pavement dynamic modulus in the MEPDG.
  4. Create a comprehensive Indiana climatic data file in XML format for input into MEPDG.

SPR-3710: Correlation between Resilience Modules (MR) of Soil, Light Weight Deflectometer, and Falling Weight Deflectometer (FWD)

Principal Investigator - Tommy Nantung (INDOT), Antonio Bobet
Start Date - 1/1/2013

The Mechanistic-Empirical Pavement Design Guide (MEPDG) requires pavement design input parameters that are accurate, representing actual conditions in the field. One such parameter is the soil resilient modulus. Equipment such as the Light Weight Deflectometer (LWD) and Falling Weight Deflectometer (FWD) is utilized to determine the in-situ resilient modulus for pavement design. A conversion factor is needed to convert the FWD and LWD values to the resilience modulus value for the MEPDG input. The objective of this proposal is to make the conversion factor of the FWD and LWD values to the resilience modulus more accurate.

SPR-3709: Intelligent Compaction - Soils, Data Interpretation and Risk/Reward Assessment

Principal Investigator - Phillip Dunston
Start Date - 10/1/2012

The main deliverables of this project will be recommendations and guidelines for the future use of intelligent compaction IC as a QC/QA tool for soil embankment construction. Analysis aims to establish a correlation between IC and DCP data, along with improved understanding of risks and rewards for both agency and the contractor and recommended procedures for implementation of an IC specification.

SPR-3708: Toward Performance Related Specifications for Concrete Pavements

Principal Investigator - Jason Weiss
Start Date - 1/1/2013

The current level of construction activity provides INDOT with the opportunity to collect information from concrete paving projects which can be used to generate information that may be used to improve the standards and specifications in the next generation of pavements. INDOT is poised to utilize data from pavement projects to develop new approaches for contracting and specification (PRS and PWL specifications). This information may be used to provide high quality contractors with rewards for providing this quality.

SPR-3615: Active Corridor Management

Principal Investigator - Darcy Bullock
Start Date - 1/1/2012

This research project will continue the collaborative partnership developed between the INDOT Traffic Management Team, Traffic Signal Vendors, and Purdue University to deploy a distributed management system for INDOT traffic signal infrastructure. The resulting system will result in improved traffic signal system performance to Indiana motorists. In the near term, this project will improve INDOT system performance and substantially advance the state of the practice.

This project was completed as of December 16, 2015. A final report is pending.

SPR-3506: Concrete Pavement Joint Deterioration

Principal Investigator - Nancy Whiting
Start Date - 1/1/2011

Failure of concrete at the joints of some INDOT pavements leads to costly repairs and failure to meet design life. This project is intended to identify the combinations of design, construction practices, materials and/or environmental factors that lead to distress and premature failure.

This project was completed as of January 21, 2016. A final report is pending.