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Mid-America Transportation Center

Effects of Geometric Design Features on Truck Crashes on Limited Access Highways

Final Report
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Researchers

  • Principal Investigator: Sunanda Dissanayake (sunanda@ksu.edu 785-532-1540)
  • Project Status
    Complete
    Sponsors & Partners
  • Kansas State University
  • About this Project
    Brief Project Description & Background
    Trucks are larger in size and weight and typically have different performance characteristics than passenger vehicles. Meanwhile more and more freight are transported using trucks, making the number and percentage of trucks on the national highway system to gradually increase. Safety effect of these large trucks is a major concern as they disproportionately account for traffic fatalities. When trucks are involved in crashes with other smaller vehicles, majority of the fatalities involve the occupants of the other motor vehicle. When looking at the ways of improving the situation, understanding the effects of geometric design features on truck crashes is expected to bring significant benefits as that is the area where transportation engineers have the highest level of influence. Accordingly, this project is expected to study truck crashes in detail by developing models to determine the influence of various geometric design features, traffic and other characteristics on truck crash occurrence.
    Research Objective
    The objectives are to identify the relationships between geometric design features, traffic, and other characteristics on truck crash occurrences, and to identify the geometric design improvements that most successfully reduce truck crashes.
    Potential Benefits
    Upon completion of the project, the characteristics and contributory causes related to increased severities of large truck related crashes will be identified, which will in turn be used to recommend countermeasure ideas to reduce severities and focus areas needing particular attention for improving the safety situation of truck related crashes.
    Abstract
    Trucks are larger in size and weight and typically have different performance characteristics than passenger vehicles. Meanwhile more and more freight are transported using trucks, making the number and percentage of trucks on the national highway system gradually increase. Safety effect of these large trucks is a major concern as they disproportionately account for traffic fatalities. When trucks are involved in crashes with other smaller vehicles, the majority of the fatalities involve the occupants of the other motor vehicle. When looking at the ways of improving the situation, understanding the effects of geometric design features on truck crashes is expected to bring significant benefits as that is the area where transportation engineers have the highest level of influence. Accordingly, this project is expected to study truck crashes in detail by developing models to determine the influence of various geometric design features, traffic and other characteristics on truck crash occurrence.
    Project Amount
    $ 109,113