A STUDY OF THE ECONOMICS OF ROAD VEHICLE LIMITS; THE IMPLICATIONS OF CHANGES IN VEHICLE MASS AND DIMENSION LIMITS ON THE ACCIDENT INVOLVEMENT AND SEVERITY OF HEAVY COMMERCIAL VEHICLES

The study took the form case studies of the Hume and Newell highways in New South Wales. The objective was to identify only factors relating to accident incidence and severity which could be attributed to these aspects of commercial vehicle operations and their characteristics likely to be affected by a change in mass or dimension limits. Trucks were found to be over-involved in accidents on a numerical basis in this and all the other studies surveyed, all studies recognised that this over- involvement was more apparent than real because of the longer distances travelled by trucks. When distance travelled was taken into account articulated vehicles were found to be over-represented in fatal accidents on both highways. Urban accidents shared a predominance of truck- into-car accidents, suggesting the possibility of inadequate truck braking. The effect of changes in length is discussed in relation to overtaking times. Of single vehicle truck accidents, 27% involved mechanical faults. Brakes, tyres, couplings and steering were most significant areas of failure. /TRRL/

  • Corporate Authors:

    National Association of Australian State Road Auth

    323 Castlereagh Street
    Sydney, New South Wales,   Australia 
  • Authors:
    • Wood, H T
    • Stevenson, JMCL
  • Publication Date: 1976-2

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 33 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00184123
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Technical Report T7 Monograph
  • Files: ITRD, TRIS
  • Created Date: Jan 13 1979 12:00AM