Recent ICT-IDOT report publications

Several reports from recently completed, Illinois-Department-of-Transportation-sponsored projects are now available on Illinois Center for Transportation’s website:

R27-SP35: Behavior of Epoxy-Coated Textured Reinforcing Bars. This report addresses some of the issues with using epoxy-coated reinforcement in bridge decks. In order to improve bond and reduce the formation of cracks, IDOT proposed texturizing the surface of epoxy-coated bars. This report provides the results from a preliminary study on the bond strength of reinforcing bars with this new style of coating.

R27-150: Revised Condition Rating Survey Models to Reflect All Distresses: Volume 1. This report discusses the importance of pavement management. With the help of recent data, this report also provides updates and revisions to the current Condition Rating Survey models for calculating and predicting the condition of pavement.

R27-150: Development of Pavement Performance Prediction Models for Preservation Treatments: Volume 2. This report documents the evaluation of the performance of preservation treatments used by all nine districts as part of IDOT’s pavement preservation program. After the treatments were applied, pavement condition prediction models were developed for nine different preservation treatments.

R27-156: Repair & Strengthening of Distressed/Damaged Ends of Prestressed Beams with FRP Composites. This report provides a design method for repairing the end damage of prestressed concrete beams or girders in bridges. The proposed design method is based on the use of fiber-reinforced polymer composites, which will allow IDOT to extend the life of prestressed beams by re-establishing the strength of the beams and avoiding the extremely costly beam replacement.

R27-SP32: Safety Evaluation of Red Light Running Camera Intersections in Illinois. This report documents the results of the evaluation of the crash-based effectiveness of Red Light Running cameras at 41 suburban Chicago intersections. The analysis used the naïve before-and-after methodology and the empirical Bayes methodology. Data covering three years before and three years of after-installation was used for many of the candidate locations to quantify the safety benefits of RLR cameras on state routes in the Chicago suburbs. The report also summarizes the geometric, traffic, and operational data at the RLR camera sites.

R27-SP33: Spillover Effect and Economic Effect of Red Light Cameras. This report covers the analysis of the spillover effects to determine whether crashes were reduced at intersections adjacent to RLR camera intersections. It also documents the economic analysis of the RLR camera locations included in the study, based on the results of the before and after crash-based evaluation.