CHARACTERISTICS OF HEAVY TRUCK ACCIDENTS

The purpose of this research effort was to: determine accident rates and characteristics for heavy trucks on rural Interstate and primary highways in Indiana for 1974 and the first six months of 1975 under the 55 mph maximum speed limit and for 1970-1972 under the 70 mph and 65 mph limits; evaluate heavy truck accident involvement for the same classes of highways during the same time periods; evaluate the effect on accident rates of the condition where all vehicles are travelling at nearly the same speed. Under the 55 mph speed limit when compared with data from before the 55, it was found that average truck accident rates decreased significantly on Interstate and other four-lane highways. However, the reduction in average rates was not significant on two-lane highways. The decreases in average rear end collision truck accident rates were significant on Interstate as well as on other four-lane. It was not significant on two-lane highways. The changes in average rates of ran-off-road and side-swipe truck accidents were not significant on the three classes of highways. The decreases in average right-angle truck accident rates were significant on other four-lane as well as on two-lane highways. The ratio between truck and passenger car accident rates decreased significantly on Interstate highways under the 55 mph limit but truck rates were still greater than passenger car rates. On other four-lane highways, each passenger car and truck were similarly involved in accidents under the 65 mph speed limit but there is an indication that under the 55 mph limit a truck is more involved than a passenger car. The increase in ratio between truck and passenger car accident rates was found not significant. On two-lane highways, a passenger car was found to be much more involved in accidents than a truck under the 65 mph speed limit. On the other hand, truck and passenger car rates were similar under the 55 mph limit. The increase in ratio between truck and passenger car accident rates was also significant for this highway class. /Author/

  • Corporate Authors:

    Purdue University/Indiana Department of Transportation JHRP

    Purdue University, School of Civil Engineering
    West Lafayette, IN  United States  47907-1284
  • Authors:
    • Radwan, AES
  • Publication Date: 1976-6-23

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 113 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00139256
  • Record Type: Publication
  • Report/Paper Numbers: JHRP-76-18
  • Files: TRIS
  • Created Date: Sep 4 1976 12:00AM