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Do They Work Traffic Safety Cameras Literature Review

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Do They Work? Traffic Safety Cameras. Literature Review. Melissa Beard. Research Analyst ... Contact Information. Melissa Beard. Washington Traffic Safety ... – PowerPoint PPT presentation

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Title: Do They Work Traffic Safety Cameras Literature Review


1
Do They Work?Traffic Safety Cameras Literature
Review
  • Melissa Beard
  • Research Analyst
  • Traffic Safety Commission

2
Presentation Outline
  • Why are we here?
  • General Deterrence Theory
  • Criticisms
  • Railroad Crossings
  • School Zones
  • Red Lights
  • Discontinued Use
  • Confounding Factors
  • Recommendations

3
Why are we here?
  • The goal of traffic law is not to apprehend and
    punish violators, but to reduce harm by
    preventing violations. (Leonard Evans)
  • Money
  • Raise revenues?
  • Reduce expenditures?
  • Improve safety on our roads
  • Less than 1,000 people died in the air, on a
    train or on a bus
  • Over 42,000 people died on interstates, state
    highways, city streets or county roads in 2004

4
General Deterrence Theory
  • Sure
  • Swift
  • Severe

5
Criticisms
  • Privacy
  • Survey results
  • Costs to society

6
Railroad Crossings
  • 570 Collisions, 45 Fatalities
  • Demonstration project in Los Angeles County
  • FHWA Report

7
School Zones
  • Increasing speed increases probability of a
    pedestrian fatality
  • 1 mph reduction 5 crash reduction
  • Systematic Review
  • Engineering Changes
  • Site Selection

8
Red Lights
  • Over 100,000 crashes Over 1,000 fatalities
  • Systematic Review
  • Economic Findings
  • Guidelines
  • Crash and Red Light Citation History
  • Approach Speeds
  • Traffic and Pedestrian Volumes
  • Intersection Degree of Saturation
  • Perceived Benefit to Cost
  • Red Light Camera Systems Operational Guidelines
    January 2005 FHWA/NHTSA Publication
  • Site Suggestions

9
Discontinued Use
  • Virginia
  • Long Beach, North Carolina, Tempe
  • San Diego

10
Correlation does NOT equal Causation!
  • Confounding Factors
  • Regression to the mean
  • Spillover effects
  • Accident migration

11
Recommendations
  • Research funding implications
  • Develop formalized rating/ranking procedures
  • Inform citizens of
  • Traffic safety problem in the area
  • Advantages of technology
  • Distribution of ticket fines
  • Program efficiency and effectiveness
  • Commit staff and resources for public awareness
  • Involve judiciary in planning
  • Set quantifiable objectives and goals
  • Create uniform evaluation protocol

12
Questions?
13
Contact Information
  • Melissa Beard
  • Washington Traffic Safety Commission
  • mbeard_at_wtsc.wa.gov
  • 360-586-3348
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