CTRE

Center for Transportation Research and Education

CTRE|Research|In-Progress

Analysis of Dynamic Speed Feedback Signs at Transition Zones

Project Details
STATUS

In-Progress

PROJECT NUMBER

23-870

START DATE

11/01/23

END DATE

06/30/25

FOCUS AREAS

Mobility, Data Analytics, and Resiliency, Safety

RESEARCH CENTERS InTrans, CTRE, REACTOR
SPONSORS

Iowa Department of Transportation

Researchers
Principal Investigator
Jonathan Wood

Faculty Affiliate, CTRE

About the research

This project is on the evaluation of the impacts of dynamic speed feedback signs (DSFS) being installed in Iowa at transition zones as posted speed limits are reduced as highways enter towns. The first phase, focusing on the impacts of the signs on traffic operating speeds, will utilize connected vehicle and other data sources to provide data analytics to evaluate the effectiveness of the DSFS in transition zones. Data for all locations being installed in Iowa in 2023 and 2024 (approximately 80 total locations) and 80 similar locations without DSFS will be used in the study. Additionally, crash, traffic volume, and other data for these locations will be collected as part of this phase of the project to support a potential second phase that will focus on evaluating the impacts of DSFS on crashes in transition zones.

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