Project Spotlight

Research Sheds New Light on Integral Abutment Bridges Behavior

Published October 23, 2017

Integral abutment bridges are constructed without expansion joints. Due to the high maintenance costs associated with expansion joints—as a result of water seeping through the joints and causing damage to the beams and bearings at joint locations—integral abutment bridges (IAB) have become increasingly popular in the past 30 years, not only because of the economic advantages of these structures, but also because of their proven functionality and durability.Read More

IDOT Adapts Construction Staking to Modern Technology

Published September 15, 2017

In a world that is increasingly shaped by improving digital technologies, the past few decades brought great advances in technology for highway construction and engineering. Such advances almost always aim to reduce costs and improve quality. For instance, incorporating technologies, such as the global positioning system (GPS) and civil information modeling (CIM), among others, in highway construction is believed to lead to improvements in construction quality while reducing construction time and cost.Read More

ICT/IDOT Propose the First Oversize/Overweight Permit Fee Structure Incorporating Safety Cost Analysis

Published July 5, 2017

Trucking is the lifeblood of commerce for the State of Illinois. In order to ensure the infrastructure of the state can safely support the movement of goods and services, the state regulates oversized and overweight (OSOW) vehicles, such as semis and large trucks, using a fee-based permit system. This fee system had not been evaluated, to ensure fees correspond to the effects OSOW vehicles have on infrastructure, for several decades. IDOT recognized that this system needed to be reviewed and possibly revised. In support of this, Illinois Center for Transportation (ICT) researchers used a variety of state-of-the-art techniques to sort through data and model the impact of OSOW vehicles on bridges, roads, and safety, in order to develop a fair, justifiable fee structure. The findings for the project, “Development of a Proposed Overweight Vehicle Permit Fee Structure in Illinois,” are now available on ICT’s web site.Read More

A New Tool for Concrete Infrastructure Evaluation

Published May 22, 2017

Repairs and maintenance for the transportation infrastructure of Illinois present a potentially huge cost to the state. In order to test new technology that  could provide “effective, efficient, economical, and rapid data collection” of pavements, bridge decks, and other concrete structural elements for the purpose of evaluation of their condition and the need for repairs, IDOT teamed up with ICT in a recent project, Ultrasonic Imaging for Concrete Infrastructure Condition Assessment and Quality Assurance (R27-146).Read More