Traffic Calming State of the Practice Slide Seminar

Session 4: Impacts

Impacts

Impacts of Regulatory Measures

Impacts of Education and Enforcement Measures

Impacts of Psycho-Perception Measures

Overall Assessment of Non-Physical Measures

Speed and Volume Impacts -- Somewhat Predictable

Speeds Between Slow Points

Speed Profile of a 14-Foot Hump

Speed Profile of a 22-Foot Table

Midpoint Speed vs. Hump Spacing

Volume Impacts of Traffic Calming Measures

Impact of Alternate Routes

Impact of Geometrics and Spacing

Volume Impact Model -- Volume Control Measures

Volume Impact Model -- Speed Control Measures

Cost Savings Due to Accident Reduction (Seattle)

Average Reduction in Collisions by Measure (International Experience)

Safety Impacts of Traffic Calming Measures (U.S. Experience)

Safety Impacts of Traffic Calming After Adjusting for Traffic Diversion

European vs. U.S. Traffic Calming

Other Impacts of Traffic Calming

Five Oaks Neighborhood Stabilization Plan -- Significant Impact on Crime

Street Closures in Ft. Lauderdale -- Little Impact on Crime

Speed Humps in Berkeley -- Mixed Impact on Crime

European Impacts on Bicycling and Walking

Mode Shifts in Berkeley

Impacts of Traffic Calming on Property Values

Anecdotal Evidence from West Palm Beach

Impacts of Traffic Calming on Noise Levels

Undocumented Impacts (at least in the U.S.)