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A Guide to Applying the Safe System Approach to Transportation Planning, Design, and Operations (2025) / Chapter Skim
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Appendix A: Safe System Policy Practices
Pages 73-74

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From page 73...
... . Categories Z-scores High > 1 SD above mean Moderate < 1 and > 0 Low > −1 and < 0 Very Low < −1 SD below mean Note: SD = standard deviation round the mean score of zero (0)
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From page 74...
... Developing policies requiring forward- and near Moderate Feasibility/ side-facing sensors on heavy vehicles to detect 0.337 0.324 Moderate Impact pedestrians and cyclists. Setting posted speed limits based on harm minimization principles, road function, and Moderate Feasibility/ 0.290 0.097 severe crash types rather than an 85th percentile Moderate Impact rule.
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Key Terms

  • moderate impact
  • immediate administrative
  • pedestrian intervals
  • limits based
  • installing speed

  • pedestrian detection
  • default speed
  • driver license
  • belt interlocks
  • ignition interlocks

  • setting posted
  • graduated driver
  • leading pedestrian
  • severe crash
  • alcohol concentration

  • seat belt
  • interpretive categorization
  • speed limits
  • include pedestrian
  • safety tests

  • interlocks installed
  • municipal fleet
  • impact columns
  • license renewal
  • installing leading

  • renewal program
  • extending graduated
  • alcohol ignition
  • impact category
  • instituting immediate


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