Research Highlights

December 15, 2014
In partnership, Purdue Libraries and the Joint Transportation Research Program (JTRP) achieved a major milestone on Sunday, December 7, 2014, with over one million downloads of technical reports within the Libraries’ Purdue e-Pubs, the University’s worldwide online open access Institutional document repository.
Lt. Governor Chief of Staff
November 21, 2014
On November 19, 2014, JTRP hosted a joint meeting with Tonya Brothers-Bridge, Lt. Governor Chief of Staff, Steve Abel, Purdue University Associate Vice President for Engagement, INDOT Commissioner Karl Browning and INDOT Deputy Commissioner Jay Wasson.
June 9, 2014
Runway incursions are a significant safety concern, particularly at general aviation airports. In 2013, there were over 1200 runway incursions. In May 2014, the Federal Aviation Administration (FAA) awarded a project to Profs. Darcy Bullock and Sarah Hubbard to evaluate the feasibility of using rumble strips on taxiways to warn pilots of the upcoming runway with the objective of reducing runway incursions.
May 23, 2014
Purdue University researchers have produced a new site investigation torque tool, known as SPT-T that can better characterize the soil and provide valuable data on shear strength, particularly for clay soils and glacial till. It replaces the standard practice in such soils of recovering low-quality samples that are then tested in unconfined compression. Obtaining additional real-time data onsite at a lower cost and increased reliability will lead to more effective and economical design of geotechnical structures in these soils.
April 18, 2014
Since December 2009, JTRP's Trailer Cam has provided our researchers many advantages, including a mobile traffic observation point and education and data validation featuring self-contained power and communication.
April 18, 2014
An integral component of JTRP is providing electronic access to technical reports for INDOT, as well as colleagues around the world. In 2010, JTRP and the Purdue Libraries began digitizing technical reports dating to the 1950s. More than 1,500 technical reports now reside in the JTRP Technical Report Repository on e-Pubs with 787,695 total downloads as of April 17, 2014.
April 15, 2014
Steven Lavrenz (JTRP), Pulkit Parikh, and Vinay Varadarajan represented Purdue in the regional Traffic Bowl competition sponsored by Institute of Transportation Engineers (ITE) on April 14, 2014 in Indianapolis, Indiana.

HMA and SMA surfaces
November 14, 2013
Local polish-susceptible aggregates can be used to replace a portion of high-quality friction aggregates in HMA and SMA surface mixtures without detrimental effects on friction.
Paint Truck
October 25, 2013
Prior to 2013, INDOT operated two paint trucks per district (one edge line truck and one center line truck). The Greenfield and Crawfordsville districts were chosen to develop and test ideas to enable the transition to painting with just one truck per district.
October 25, 2013
A JTRP study (SPR-3709) led by Purdue Civil Engineering Professors Phillip Dunston and Hubo Cai has been initiated to analyze the data from the IC rollers. This data, along with the corresponding Dynamic Cone Penetrometer (DCP) acceptance tests, will be used to develop allowable tolerances and acceptance testing criteria.
2012 Indiana Mobility Report
September 24, 2013
INDOT continues to innovate how it prioritizes investments in capital and operations projects to improve Indiana mobility. This report, the second in the series, provides quantitative performance measures that identify congestion according to its frequency and severity.
July 1, 2013
INDOT's Research and Development Division provides specialized testing services in a variety of areas related to pavements and structures for data driven decision making and to minimize risks. These tests assist the department in warranty contract compliance, pavement designs, safety of Indiana roadways, and forensic investigations.
End of Beam
May 14, 2013
The objective of this research is to develop design strategies to improve the efficiency and optimize the design of the Indiana modified U-beam. The research program has been focused in three areas (1) evaluating the live load distribution appropriate for the design of U-beams, (2) assessing the behavior and design of the bridge deck when supported by U-beams, and (3) evaluating both the shear strength and shear design of the composite U-beam system.
Internally Cured Bridge Deck
April 1, 2013
Internally cured high performance bridge concrete (ICHPC) is a standard bridge deck concrete mixture in which a portion of the cement is replaced with silica fume and fly ash to improve the properties, providing a more dense and less permeable material.
April 3, 2013
In 2008, Robert Frosch, Michael Kreger, and Aaron Talbott completed "SPR-2867: Earthquake Resistance of Integral Abutment Bridges." The project examined the response of integral abutment bridges to seismic loading. The project combined the results of field, analytical, and laboratory investigations to evaluate allowable bridge lengths based on seismic performance.
February 4, 2013
Recently, Alain El Howayek, Antonio Bobet, Sulaiman Dawood, Andrew Ferdon, and Maria C. Santagata from Purdue, with Nayyar Zia Siddiki from INDOT, completed "SPR-3517: Classification of Organic Soils and Classification of Marls - Training of INDOT Personnel."
Lime Application
February 4, 2013
In 2009 Chulmin Jung, Sochan Jung, Antonio Bobet and Nayyar Siddiki completed "SPR-3380: Field Investigation of Subgrade Lime Modification." That project investigated the quality of the treatment that would be obtained using current construction procedures and also explored other methods that could provide a more uniform and better quality subgrade.JTRP research project investigates the quality of the treatment that would be obtained using current construction p
November 20, 2013
Rumble stripes are an effective countermeasure for preventing roadway departure crashes. The noise and vibration produced by rumble stripes alert drivers when they leave the traveled roadway. Rumble stripes is the term used for stripes painted with a retro reflective coating to increase the visibility of the pavement edge at night and during inclement weather conditions.
January 21, 2013
In December 2012, Monica Prezzi, Min Sang Lee, and Yoon Seok Choi completed "SPR-3225 Quality Assessment of Geogrids used for Subgrade Treatment." The project objective was to evaluate the mechanical interaction between a subgrade soil and an aggregate base layer with and without a geogrid in place at the interface. A series of large-scale direct shear tests were performed to investigate the effects of geogrid properties, such as geogrid aperture area, junction strength, and tensile strength, on the interface shear strength of soil-geogrid-aggregate systems.
Sommer Testing
January 14, 2013
On January 10, 2013, Purdue University and INDOT's Division of Materials and Tests partnered to provide hands on training on new equipment for quality control testing on concrete samples. The training was held in Indianapolis at the office of Materials Management and attended by INDOT's district testing personnel, the Federal Highway Administration and a representative from the Indiana Chapter of the American Concrete Pavement Association.
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