Pedestrian Injury Causation Study (Pedestrian Accident Typing)
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Pedestrian Injury Causation Study (Pedestrian Accident Typing)

Filetype[PDF-2.45 MB]


  • English

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      Final report
    • Abstract:
      A new computerized pedestrian accident typing procedure was tested on 1,997 cases from the Pedestrian Injury Causation Study (PICS). Two coding procedures were used to determine the effects of quantity and quality of information on accident typing accuracy. The first procedure used information from police accident reports (PARS) only, while the second procedure used additional data available in the completely documented cases. Overall agreement between the two accident typing procedures at the most general level was good--82.1 percent. However, at the most detailed level, substantial disagreement in accident types was observed (44.50). This latter rate of disagreement suggests shortcomings in the PAR data, and indicates the benefits of coding the accidents using all pertinent information available in the completed cases. Differences in analyst ability were apparent, but all analysts showed improvement when coding from completed cases. Implementation of the new pedestrian accident typing procedure into NASS appears consistent with the current level of effort in investigation, but additional information not currently recorded in the NASS file is required. Also, a need to request similar information from multiple sources is apparent due to a general lack of physical evidence. Use of a modified accident typing coding form for field data collection will allow for a comparison of responses from multiple sources, avoid necessary modifications to current NASS data forms, eliminate the need to transfer data from various forms, and expedite quality control procedures. The accident type may be determined at the PSU or Zone Center level by running the computerized accident typing program just as the CRASH reconstruction program is used. The 3-digit accident type could then be added as a NASS variable. /Abstract from report summary page/
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