Research Highlights

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.
Reclaiming asphalt pavement
January 10, 2013
Reclaimed asphalt pavement (RAP) is an attractive replacement for a portion of the virgin aggregates and asphalt liquid. Incorporating milled pavement also reduces the need for disposal of the asphalt that contains valuable aggregate and asphalt.
High Perf Concrete Spacing
January 7, 2013
INDOT initiated a study to assess the impact of joint spacing on premature concrete pavement deterioration.

Recycled tires
January 8, 2013
Tire shred-soil mixture backfill is a low-cost material used in construction projects and provides many advantages over traditional backfill materials.
November 12, 2012
Each year, approximately 4,000 drivers damage infrastructure located along Indiana highways. This infrastructure includes guardrails, cable barriers, crash attenuators, lighting structures, signs, bridges, culverts, fences, traffic signals, pavement, and roadway drainage.
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