Case Study Tag: evaluation

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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 ArticleLocal News ArticleAASHTO Case Study

Enhancing Curve Signing on Rural Two-Lane Roadways in North Carolina

North Carolina
Enhanced curve signing reduced lane departures by 33%, total crashes by 35% and fatal and injury crashes by 41%.
AASHTO 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

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

Natural Bridge Avenue Safety Project

Missouri
The Natural Bridge Ave road diet and safety project reduced speeds by 17%, reduced all crashes by 75% and fatal pedestrian crashes by 100%.
Project WebpageAASHTO Case Study

J-Turns Analysis

Missouri
J-turns reduced fatal and injury crashes by 54% and right-angle crashes by 80%.
Missouri J-Turns WebpageUniversity of Missouri ArticleAASHTO Case Study

Lane Constrictor Intersection Statewide Implementation

Minnesota
Lane constrictor intersections reduced fatal and injury crashes in Minnesota by 20%.
Traffic Safety Evaluation of Lane Constrictors ReportTRB Project PageAASHTO Case Study

J-Turn Statewide Implementation

Minnesota
J-turn intersections reduced angle crashes by 67% and fatal and serious injury angle crashes by 87%.
Minnesota J-Turn WebpageJ-Turn Driver TutorialAASHTO Case Study

MD 187 (Old Georgetown Road) Quick Build Lane Reallocation to Address Bicyclist Safety

Maryland
Lane reallocation for new bicycle lanes on MD 187 reduced bicyclist fatal and injury crashes, and improved safety for vulnerable road users.
Community Meeting PresentationProject AnnouncementReport to General AssemblyAASHTO Case Study

Examining the Impact of Centerline Rumble Strips on Reducing Rural Two-Lane Head-On Collisions in Maine

Maine
Centerline rumble strips reduced head-on and opposite sideswipe collisions by 28-48%.
Research PaperRumble Strips BrochureAASHTO Case Study
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Access mgt. B/C analysis Behavior Connected & autonomous vehicles Construction Context Design Electric vehicles Emergency response Employee safety Equity evaluation Health HSIP Innovation Intersections Land use Lane departure Law enforcement Leadership Maintenance Motor carriers Operations Outreach & education Performance management Performance measurement Planning Post-crash care Project development Public engagement Quick build Risk management Road safety audits Roadway departure Safety cameras Safety planning Systemic approach Technology Traffic incident management Training Transit Tribal safety Vulnerable road users Weather Wrong-way driving