Safety Data and Analysis in Developing Emphasis Area Plans (2008) / Chapter Skim
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Pages 68-73
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From page 68... ...
The traffic engineer should use his or her judgment to determine which subset of crashes or driver population may be affected by each treatment application being considered. The benefits of a given treatment may be greater, and therefore worth more investment, when other target populations or crash types are also positively impacted.
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From page 69... ...
, the choice between alternative treatment strategies found in each of these two unsafe-driving guides is much less oriented to specific crash circumstances such as different crash types, crash location (except for the roadway-based strategies) , and times of crash (except perhaps for drowsy drivers)
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From page 70... ...
Unbelted Vehicle Occupants Seatbelt Usage Person Injury Severity Person/Vehicle Crash Type Crash Exhibit VIII-1. Crash variables and subfile location by population type.
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From page 71... ...
For each user population, the analyst could begin the process by Crash Type/Issue Variable Crash Database Subfile Driver Age Driver Age Person/Occupant or Vehicle Driver Date of Birth Person/Occupant or Vehicle Occupant Age (for Child Restraint Strategies) Occupant Age Person/Occupant Time of Crash Light Condition Hour of Day Crash Crash Vehicle Type (to Identify Large Truck Drivers)
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From page 72... ...
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 73... ...
The procedure outlined above will at least ensure that the major factors in the decision are clearly defined. The output of this step will be one or more chosen treatments, with the nature of the treatment defining the specific crash types more likely to be affected.
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