Case Study Tag: Systemic approach

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Two-Way to All-Way Stop Control

New Hampshire
When all-way stop control (AWSC) was applied as a systemic safety improvement in rural areas of New Hampshire, total crashes reduced by 71%; 90% in injury crashes, and 75% in fatal crashes.
NHDOT Newsletter ArticlePress Release, ConcordPress Release, SalisburyPresentation, Chester2024 Safety Summit Poster

Data for Proactive Road Safety: Continuous Pavement Friction Measurement

Kentucky
Pavement Friction Management (PFM) using Continuous Pavement Friction Measurement (CPFM) is a proactive approach for managing pavements for safety throughout the roadway lifecycle. Taking a lifecycle approach to designing, specifying, and maintaining friction performance saved Kentucky more than $1 billion annually and reduced fatal and severe crashes by up to 24%.
FHWA Case StudyPresentation SlidesUSDOT Flyer2024 Safety Summit Poster

American Samoa Road Safety

American Samoa
The rugged terrain and high-sloped roadsides of Pacific islands is prone to rockfall, landslides, and tidal waves. American Samoa employs a variety of strategies and traffic devices to improve safety.
Highway Safety Plan 2024-262024 AASHTO Safety Summit Poster

Statewide Deployment of Center Line Rumble Strips

Oklahoma
Centerline rumble strips reduced fatal and serious injury collisions by 18%.
Local News ArticleFHWA GuidanceAASHTO Case Study

Roundabouts at High-Speed Intersections in North Carolina

North Carolina
Roundabouts at high-speed intersections reduced total crashes by 41% and fatal and injury crashes by 79%.
Evaluation of Roundabouts on High-Speed RoadwaysRoundabouts WebpageAASHTO Case Study

Reduced Conflict Intersections in North Carolina

North Carolina
Reduced Conflict Intersections reduced total crashes by 50% and frontal impact crashes by 80%.
Reduced Conflict Intersections WebpageAASHTO Case Study

All Way Stops (AWS) in North Carolina

North Carolina
All Way Stops at rural intersections reduced fatal and severe injury crashes by 92%.
All Way Stop WebpageAll Way Stop Summary BriefAASHTO Case Study

NCDOT Pedestrian Safety Improvement Program

North Carolina
The Pedestrian Safety Improvement Program implemented road safety audits and developed action plans for high-risk areas.
Pedestrian Safety Improvement WebpageAASHTO Case Study

Statewide Safety Risk Analysis and Annual HSIP Allocation to Systemically Fund Countermeasures

Florida
Statewide Safety Risk Analysis and HSIP allocation funded systemic countermeasures, significantly reducing fatal and serious injury crash rates.
FDOT System Safety Analysis ReportFDOT HSIP Implementation Plans and ReportsAASHTO Case Study
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