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Human Factors Guidelines for Road Systems - Collection C: Chapters 16, 17, 18, 19, 20, 22 (Tutorials 4, 5, 6), 23 (Updated), 24, 25, 26 (Updated) (2010) / Chapter Skim
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Speeding Countermeasures: Using Roadway Design and Traffic Control Elements to Address Speeding Problems
Pages 23-24

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From page 23...
... Clearance intervals should account for expected approach speeds and Ensure that roadway design and should reflect operating speeds, traffic control elements support Provide adequate change + intersection width, vehicle lengths, appropriate and safe speeds clearance intervals at signalized and driver characteristics such as intersections. reaction time and braking.
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From page 24...
... Using consistent combinations of geometric elements leads to roadway elements that meet driver expectancies and can result in consistent speeds and fewer unexpected speed changes. For example, large differences and sudden changes in horizontal alignment, available sight distance, curve radii, etc.
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Key Terms

  • roadway design
  • appropriate speed
  • traffic control
  • red light
  • setting appropriate

  • control elements
  • light running
  • communicating appropriate
  • speed limits
  • geometric design

  • highway safety
  • safe transitions
  • traffic signals
  • roadway elements
  • unsafe speed

  • safety plan
  • speed decisions
  • transportation research
  • empirical data
  • strategic highway

  • aashto strategic
  • research board
  • visual information
  • design consistency
  • expected approach

  • expert judgment
  • driving environment
  • safe speed
  • approach speeds
  • detect visual


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