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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 D: Safe System Operations and Maintenance Practices
Pages 79-80

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From page 79...
... . 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 80...
... Integrating asset management and crash analyses to determine when roadway conditions have Moderate Feasibility/ 0.062 0.155 degraded to the point that they are increasing the Moderate Impact likelihood and severity of crashes. Improving signal progression on designated routes Moderate Feasibility/ for emergency vehicles with predetermined signal 0.134 0.039 Moderate Impact linking plans.
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Key Terms

  • moderate impact
  • asset management
  • clearance intervals
  • implementing vsl
  • beyond pavement

  • variable speed
  • pedestrian activity
  • traffic control
  • providing extended
  • signal progression

  • sidewalk networks
  • feasibility impact
  • combining passive
  • improving signal
  • including crash

  • removing roadside
  • implementing driving
  • mean score
  • accessible pedestrian
  • action plans

  • installing leading
  • features beyond
  • designated routes
  • driving safety
  • incorporating roadway

  • deviation round
  • adverse weather
  • traverse intersections
  • safely traverse
  • integrate operational


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