Traffic Calming:

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Transportation Planning and Traffic Calming- Part
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Traffic Calming Introduction and
Applications June 21st, 2007 by Indraneel Kumar,
AICP
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• 3 Es- Education, Enforcement, and Engineering
• Police enforcement-engineering
• options- street closure
• Management of traffic by volume
• and speed
• Part of Context Sensitive Design
• Flexible design standards

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• Extension of the curb and planting
• Midblock or intersection corners
• Parallel, angled chokers, etc.
• Planting to alert the motorist
• Physical constraint
• Visual traffic calming effects

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• Tighter curb radius
• Raised crossing and intersection- alerts drivers
• Paving treatment Raised surfaces
• Visual traffic calming effects

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• Diagonal diverters create two unconnected
  streets- intersection
• Partial closure for motorized traffic

Source Delaware DOT
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Gateways, Lane Reduction
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Refuge Islands, Roundabouts / Traffic Circles
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Applications Traffic Calming

• Congress for the New Urbanism
• Wider street standards are giving way to
  narrower streets, particularly in residential
  areas
• More asphalt More vehicles

Traditional Neighborhood / Narrow Streets
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• Travel Impacts-
• Pre and post Traffic Calming travel impacts-
  motorized / non motorized travel
• Assumption- 10-20 increase in non motorized
  travel- half of that substitute motorized travel
  

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Traffic Calming Impacts- Horizontal vs. Vertical
Equity
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Traffic Calming- Sources
www.VTPI.org www.ITE.org (Traffic Calming State
of the Practice) www.PBIC.org www.PPS.org www.Traf
ficCalming.org http//www.fhwa.dot.gov/environment
/tcalm/index.htm www.planning.org (Traffic
Calming PAS 456) http//www.io.com/bumper/ada.h
tm
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Thank you!!!
ikumar_at_purdue.edu