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Case Study Filter: Countermeasures
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WISDOT’s Approach to Reducing Intersection Crashes
Wisconsin
Intersection safety improvements and data enhancements prioritized effective safety countermeasures, leading to improvements at 175 intersections.
Intersection Webpage
ICE Resources
Safety Certification Process
AASHTO Case Study
High Friction Surface Treatment on Vertical Curves
West Virginia
HFST on vertical curves reduced wet weather crashes by 84%.
AASHTO Case Study
Tennessee’s Pedestrian Road Safety Initiative: A Strategic Approach to Addressing High Risk Locations for Vulnerable Roadway Users
Tennessee
Pedestrian Road Safety Initiative (PRSI) funds projects to reduce fatal and severe pedestrian crashes.
Program Website
AASHTO Case Study
Crash Modification Factors for High-Tension Cable Median Barriers in Pennsylvania
Pennsylvania
High-tension cable median barriers reduced cross-median crashes by up to 83%.
Report
Press Release
Local News Article
AASHTO Case Study
Crash Modification Factors for High Friction Surface Treatments in Pennsylvania
Pennsylvania
High Friction Surface Treatments (HFST) reduced crash frequency by 30% to 76% at curves and intersections.
HFST Webpage
Video
AASHTO Case Study
Oregon DOT’s Safety Priority Index for Enhanced Crosswalks
Oregon
Safety Priority Index for Enhanced Crosswalks (SPIE-C) prioritized crosswalk investigations and improvements.
AASHTO Case Study
Installation of High-Tension Cable Barrier to Prevent Severe Cross Over Median Collisions
Oklahoma
High-tension cable barriers reduced cross-over median serious injury and fatality collisions significantly.
Local News Article
AASHTO Case Study
Statewide Deployment of Center Line Rumble Strips
Oklahoma
Centerline rumble strips reduced fatal and serious injury collisions by 18%.
Local News Article
FHWA Guidance
AASHTO Case Study
Accelerating the Widespread Adoption of Roundabouts
Ohio
Accelerating roundabout adoption reduced total crashes by 33% and injury crashes by 71% at single-lane roundabouts.
Ohio HSIP Program Website
Roundabouts Website
AASHTO Case Study
Shoulder and Centerline Rumble Strips on Rural Two-Lane Roadways in North Carolina
North Carolina
Rumble strips on rural two-lane roadways reduced lane departure crashes by 30%.
Local News Article
Local News Article
AASHTO Case Study
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