Transcript Document 7119257

Federal Highway Administration University Course on Bicycle and Pedestrian Transportation
Publication No. FHWA-HRT-05-124
Traffic Calming
Lesson 20
Photo Source: PBIC, www.pedbikeimages.org
Federal Highway Administration University Course on Bicycle and Pedestrian Transportation
Lesson Outline
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Need for traffic calming.
Goals and objectives of traffic calming.
Traffic calming issues.
Types of traffic calming devices.
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Federal Highway Administration University Course on Bicycle and Pedestrian Transportation
Need for Traffic Calming
• Cut-through traffic.
• Relatively high speeds in neighborhoods.
• Determine the source of the problem.
– Why do people cut through neighborhoods?
• Traffic backup on main route.
• More direct connection.
– Why do people speed?
• Make up time due to delay on main route.
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Federal Highway Administration University Course on Bicycle and Pedestrian Transportation
Need for Traffic Calming
Principal arterial
Traffic problem:
poor signal timing
Alternate
routes
Traffic
calming
needed
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Federal Highway Administration University Course on Bicycle and Pedestrian Transportation
Goals and Objectives of
Traffic Calming
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Increase safety by slowing vehicle speeds.
Improve street feel.
Enhance aesthetics.
Reduce crime.
Provide a balance among modes.
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Federal Highway Administration University Course on Bicycle and Pedestrian Transportation
Goals and Objectives of
Traffic Calming
• Slows vehicle speeds.
• Increases safety.
• Accommodates motor vehicles.
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Federal Highway Administration University Course on Bicycle and Pedestrian Transportation
Traffic-Calming Issues
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Safety.
Impact of traffic operations.
Lack of proven design standards.
Liability.
Emergency/service vehicle access.
Impacts on bicycling.
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Federal Highway Administration University Course on Bicycle and Pedestrian Transportation
Traffic-Calming Treatments
Curb
extensions
Left turn
movement around
traffic circle
Neck down
Truncated
diagonal
diverter
Diagonal
diverter
Chicane
Traffic
circle
Cul-de-sac
Curb
extensions
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Federal Highway Administration University Course on Bicycle and Pedestrian Transportation
Types of Traffic-Calming Devices
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Raised pavement areas.
Reduced street area.
Street closures.
Traffic diversion.
Texture and visual devices.
Parking.
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Federal Highway Administration University Course on Bicycle and Pedestrian Transportation
Combination Devices
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Woonerf.
Entry treatments.
Slow streets.
Channelization.
Traffic calming on major roads.
Modified intersection design.
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Federal Highway Administration University Course on Bicycle and Pedestrian Transportation
Lesson Summary
• Traffic calming is a viable alternative for
having different types of transport share the
street.
• There are many types of traffic-calming
devices and strategies from which to
choose.
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