Research Publications

New county bridge design standards for single-span concrete slab bridges offer local agencies a cost-effective and consistent solution for replacing aging bridges throughout Iowa.

Driver education curriculum and supporting materials were updated and developed to address the most concerning topic areas for teenage drivers.

This project identified best practices for overseeing the planning and installation of utilities within the public Right of Way.

Local agency road workers use this traffic control guidance to provide uniform and efficient operation for traffic through work zones.

Eight states have joined forces to test new materials for roads, bridges, and other structures.

New open data standards are helping state DOTs bring the benefits of digital delivery to bridge design and construction.

Discussing common winter maintenance issues and strategies and identifying potential ways to work together, helps streamline individual and collaborative efforts.

Researchers plan to develop a risk assessment tool that identifies the roadway segments at greatest risk after a given storm.

This project aims to quantify the impacts of different lane-width and shy-distance combinations.

This study provides new guidance on how to improve the effectiveness of a zipper merge strategy in work zones that require a lane closure.

This study explored how connected traffic control devices like arrow boards can help agencies deliver clear and accurate work zone information to motorists.

This pooled fund facilitates collaboration among its 33 state DOT members to improve concrete pavement practices and technologies.

This joint effort studied real-world crashes and close calls involving advanced driver assistance features to better understand their impact.

This study explored how connected traffic control devices like arrow boards can help agencies deliver clear and accurate work zone information to motorists.

Biodegradable cornstarch hydrogel in concrete mixes may provide added strength and durability while offering protection against harsh freeze-thaw cycles

This project provides a breakdown of bridge deck overlay options considering service life, cost, road closure time, and the other trade-offs.

Evaluating the validity of proposed resistance factors for bridge foundations led to the development of updated design recommendations.

This project tests coarse aggregate to understand the properties that determine longevity.

This research evaluated the suitability of less expensive crowdsourced data for the purpose of supplying congestion updates.

This study developed standardized practices for work zones and temporary traffic control at new and innovative intersections.