Traffic crashes and traffic flow conditions on Auckland's SH1 Southern Motorway

Motorway crashes are critical from a traffic safety as well as an operational point of view. They not only impact traffic safety but also cause non-recurrent congestion. The probability of a crash is significantly affected by traffic flow and environmental weather conditions that sometimes change adversely. This paper will discuss the detailed analysis of road crash data with varying traffic flow. A case study using data collected over a 11.28 km section of Auckland's Southern Motorway (SH1) identified factors that included time periods, weather, lighting conditions, week day/week end and others that were over representative. The results of this study demonstrated that the highest frequency of crashes occurred in the PM peak period when traffic flow was heavy between 3600 to 4788 vehicles per hour. Most of the crashes occurred during day time peak and shoulder peak periods and were mostly rear end movement type crashes.


  • English

Media Info

  • Pagination: 12p
  • Monograph Title: Moving towards prosperity: IPENZ Transportation Group 2011 Conference, Auckland, 27-30 March 2011

Subject/Index Terms

Filing Info

  • Accession Number: 01339139
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, ARRB, ATRI
  • Created Date: May 9 2011 9:54AM