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Commercial motor vehicle speed control devices
  • Published Date:
    1991-05
  • Language:
    English
Filetype[PDF-489.94 KB]


Details:
  • Publication/ Report Number:
  • Resource Type:
  • NTL Classification:
    NTL-FREIGHT-Trucking Industry ; NTL-SAFETY AND SECURITY-Accidents ; NTL-SAFETY AND SECURITY-Speed Limits ; NTL-SAFETY AND SECURITY-SAFETY AND SECURITY ;
  • Abstract:
    Transferred from EDL on 5/14/2008

    This report reviews the problem of heavy vehicle speeding (in particular, speeding at greater than 65 mph)

    and speeding-related crash involvements. The report describes and assesses devices available to control

    truck speed, and addresses the question of whether the use of speed control devices by heavy trucks should

    be mandated. The report finds that, by all measures of crash involvement, speeding is not a significant

    factor in the crash picture of single-unit trucks. Thus, most of the report addresses combination-unit trucks,

    which present a more complex picture.

    Non-detectable radar studies show that highway speed limit compliance by combination-unit trucks is poor,

    but better than that of passenger vehicles. Most trucks that speed travel at just over the posted speed limit.

    Crash statistics indicate that speeding is generally less involved in combination-unit truck crashes than it is

    in passenger vehicle crashes. The report describes devices available to control truck speed, and ways that

    they are applied in commercial fleet settings. The report is supportive of fleet applications of speedmonitoring

    and speed-limiting devices, but concludes that there is not sufficient justification to consider

    requiring all heavy trucks to be so equipped. Problem size statistics suggest that the number of target

    crashes is low, e.g., approximately 30 fatal crash involvements per year for combination-unit trucks. This

    small crash problem size, together with uncertainties regarding the potential for crash reduction, suggest

    that the benefits of mandatory speed limitation are questionable.

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