The Illinois Department of Transportation (IDOT) currently uses the computer screening model Illinois CO Screen for Intersection Modeling (COSIM) to estimate worst-case CO concentrations for proposed roadway projects ...

Quality assurance programs for hot-mix asphalt (HMA) have evolved from method to quality assurance specifications that distribute responsibilities and risks between contractors and owners. The Illinois Department of ...

Crack sealing has been widely used as a routine preventative maintenance practice. Given its proper installation, crack sealants can extend pavement service life by three to five years. However, current specifications for ...

In the 60s, 70s, and 80s, many Illinois local road agencies successfully used “conventional” asphalt emulsions for In-Place Recycling to produce Emulsion-Aggregate-Mixtures (EAMs). In more recent years, these emulsions ...

Illinois Department of Transportation (IDOT) has been replacing the incandescent traffic signal modules with LED modules at various intersections. Using LED modules from different manufacturers on the same intersection ...

Steel furnace slag (SFS) is an industrial by-product material that can contain free calcium oxide (CaO) and free magnesium oxide (MgO), both of which can cause significant expansion when hydrated. SFS aggregates are therefore ...

A series of five experimental projects were constructed to better determine the life-cycle cost and performance of pavement overlays using various types and combinations of recycled materials—namely, reclaimed asphalt ...

This report summarizes the design and construction of ten extended life continuously reinforced concrete pavement test sections at the Advanced Transportation, Research, and Engineering Laboratory (ATREL). The ten sections ...

This project evaluated the ability of interlayer systems used in HMA overlays to retard reflective cracking. Field crack surveys and forensic investigation, including video imaging and ground penetrating radar surveys as ...

This report introduces the development process of an Internet-based, GIS-compatible software tool for Illinois local road crash analysis. This state-of-the-art tool is capable of performing crash information query, ...