Research Publications

This project evaluated different combinations of lane widths and shy distances in work zones to determine dimensions that improve safety and mobility outcomes.

From this analysis, Iowa DOT updated their specification to establish different requirements based on the duration and complexity of the construction.

This is a summary of IHRB research activity in 2024.

This project is preparing Iowa DOT and other agencies for quick and complete adoption of new methodologies and resources in the updated Highway Safety Manual.

This project evaluated whether using a very early strength latex-modified concrete (LMC-VE) as a bridge deck overlay extended the service life of a bridge

Iowa joined the second phase of this pooled fund to learn more about DPS technology and continue to improve density construction leading to longer-lasting pavements.

This study explored an on-road structure (ORS) as an alternative to traditional culvert designs that could improve flood resistance.

This project evaluated the use of a camera to capture optical and infrared imagery to identify snowy roads in both sufficient and poor illumination conditions.

Iowa DOT evaluated the use of concrete grinding residue as a soil stabilizer in highway road shoulders.

This pooled fund works to foster collaboration between Midwestern states developing connected and automated vehicle strategies.

The Performance Centered Concrete Construction (P3C) initiative develops new processes and technologies to help test and monitor paving concrete for long-term performance.

To enable rapid assessments of infrastructure risk during flooding events, Iowa DOT sought to create the Riverine Infrastructure Database (RIDB).

This project developed tools to evaluate and track sustainability initiatives.

Researchers identified a range of issues and provided recommendations to support transportation agencies in optimizing CV and RWIS data.

This project developed models that simulate the effects of temperature and shrinkage on concrete to fine-tune frame pier bridge design

This project identified a range of issues and provided recommendations to support transportation agencies in optimizing CV and RWIS data.

This project evaluated the performance of a prefabricated concrete barrier that included full scale crash testing the new bridge railing.

This project studied a wireless skin sensor network that engineers applied to the girders of a steel bridge in order to monitor fatigue cracks.

Iowa DOT hosted a research and innovation peer exchange from Sept. 24 - 26, 2024 in Des Moines. This report summarizes attendees’ key takeaways and opportunities to enhance Iowa’s Research program.

The primary objective of this project is to develop updated lighting strategies that create effective lighting for construction activities while also promoting worker and driver safety.