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Safety Data and Analysis in Developing Emphasis Area Plans (2008) / Chapter Skim
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Pages 54-58

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From page 54...
... While the crash types will differ, details of the use of all three of these "known-effectiveness procedures" are provided in Section IV on "Roadway Segment Programs." Thus, the basic steps in Procedure 3 presented below will be appropriate for all four of the road user populations covered in this section. The data (e.g., variable values used to define older driver crashes and crash types for older drivers vs.
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From page 55...
... The relative magnitude of the crash types and severity levels that the treatment will affect c) The cost of the potential treatments (either jurisdictionwide, per-mile or per-location)
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From page 56...
... A better solution is to weight each crash for a given user population by an economic cost based on its severity, and then accumulate the total crash cost for each population. Information on economic cost per crash severity level can be found in Crash Cost Estimates by Maximum Police-Reported Injury Severity Within Selected Crash Geometries (22)
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From page 57...
... If not already conducted in the "drilldown" analysis in the preceding step, more specific information on the total crash cost related to each potential treatment strategy could be developed by specifying the crash types that are most likely to be affected by each strategy (e.g., pedestrian-crossing crashes at higher-speed intersections as targets for intersection traffic calming treatments) , producing crash frequencies for each specified crash type, and multiplying the frequencies by cost per crash.
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From page 58...
... Total crash cost would be a much superior criterion if the target crash types being compared differ with respect to crash severity (e.g., turning crashes vs. head-on crashes)
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Key Terms

  • work zone
  • target crashes
  • crash cost
  • network screening
  • crash types

  • crash frequencies
  • crash data
  • treatment effectiveness
  • crash type
  • total crash

  • inventory data
  • user population
  • data produce
  • crash report
  • established goal

  • target crash
  • nchrp report
  • treatment gaps
  • type vehicle
  • potential treatment

  • chosen treatment
  • crash severity
  • vehicle type
  • potential treatments
  • crashes involving

  • available budget
  • priority crash
  • highway safety
  • specific crash
  • crash variables


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