US State: Iowa

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Development and Application of Safety Performance Functions in Project Delivery

Iowa
Based on models of Safety Performance Functions (SPFs), Iowa screened roadway facilities for Potential for Crash Reduction (PCR). PCR was then applied to project screening and prioritization, intersection projects, Super-2 corridor studies, a pilot safety corridor program, and environmental assessments.
Iowa State University ArticleIowa DOT PCR Portal2023 Safety Summit Poster

Method for Short-Term Network Screening

Iowa
Iowa DOT's short-term network screening method identifies freeway segments most likely to have excess crashes in coming weeks, which helps prioritize emergency response and enforcement. Seasonal conditions (weather, animal crossings) may be factored into crash risk. The method can also help with the design of effective countermeasures.
2024 Safety Summit Poster

Data-Driven Strategies Using Predictive Modeling and Interactive Dashboards

Iowa
Since traffic safety projects often yield varying impacts on safety performance, Iowa DOT established a robust system to track crash histories related to safety projects, which is essential to assess project effectiveness, efficiency, and return on investment. The system is helpful to site identification, safety issue diagnosis, and countermeasure evaluation.
Traffic Safety Dashboards2024 Safety Summit Poster

Advancing Work Zone Safety: Real-Time Digital Workers

Delaware Iowa Louisiana Nebraska
Work zones pose significant dangers to both workers and drivers. Traditional notification systems often fail to provide real-time information. DOTs are using platforms like EDOT to integrate various data streams and provide automated, real-time alerts about active work zones, fostering collaboration and more comprehensive safety measures.
ARTBA Case Study2024 Safety Summit Poster
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