The purpose of the project reported on here was to investigate methods for automatic traffic sensing using traffic surveillance cameras, red light cameras, and other permanent and pre-existing video sources. Success in ...

This report presents the results of a comprehensive literature review focusing on corrosion performance of reinforced concrete bridge decks, with a particular emphasis on the relative performance of alternative corrosion-resistant ...

Pavement rehabilitation and preservation treatments have become standard practice for state and local transportation agencies. The ultimate goals include maintaining a safe and reliable level of service for all users, ...

Federal reporting shows a relatively constant number of pedestrian and bicycle fatalities at highway-rail and pathway-rail grade crossings over the past 10 years. This is in contrast to a marked decrease in train–vehicl ...

This research was conducted under four study phases. Phase 1 involved a full scale laboratory study to evaluate three different underdrain pipe and envelope systems. It was found that an open graded FA-4 envelope material ...

A research investigation was conducted on the erosion potential of stabilized subbases under concrete pavements and asphalt layers supporting concrete overlays. Through field surveys and testing in Illinois, this project ...

The typical slab dimensions for a concrete pavement are 12 ft wide by 15ft long with slab thicknesses ranging from 6 to 14 inches depending on the level of traffic. The required thickness is primarily dependent on the ...

In Illinois, hot-mix asphalt overlaid concrete pavements typically exhibit reflective cracking of joints and cracks from the pavement below, resulting in shortened life and maintenance issues. Over the years, various ...

In pavement unbound aggregate layers, fines content (passing No. 200 sieve size or finer than 0.075 mm) characteristics influence the aggregate matrix strength and the modulus and deformation behavior. A laboratory ...

Air toxics is an emerging area that receives more and more attention—from transportation/environmental agencies, academic researchers, and the public—because of potential health issues and uncertainties with modeling and ...