Research Publications

SWZDI provided recommendations to optimize Speed Feedback Trailer (SFT) use and increase safety.

Five states from different regions of the United States pooled their knowledge and financial resources to research and test innovative culvert configurations.

Iowa DOT investigated when UHPC closure joints reinforced with noncontact lap-spliced rebar could be subjected to vehicular or construction loading.

Researchers developed machine learning tools to evaluate road images for snow coverage and estimate road surface conditions across a highway network.

This project developed a methodology to quantify the impacts of superloads on the structural integrity of Iowa roads.

This study demonstrates the performance properties of eggshell powder as a soil-stabilizer, with data confirming the best processing method.

This pooled fund is a collaborative program between state DOTs and the Midwest Roadside Safety Facility dedicated to sponsoring roadside safety research.

This project will monitor the construction process of a new concrete bridge deck which uses a concrete additive intended to limit water intrusion.

This pooled fund facilitates and supports successful tech transfer of maintenance-related innovations among member states.

This study looked at ways to impact safety culture, leading to safer roads with fewer crashes and fatalities.

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.

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 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

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.