Implementation and Evaluation of an Innovative Wide Centerline to Reduce Cross-Over-the-Centerline Crashes in Queensland

Wide centerline treatment (WCLT) has recently been recognized to be an effective and relatively low-cost countermeasure to reduce cross over centerline crashes, in particular head-on collisions. WCLT has been trialed in other states and overseas, but its effectiveness in reducing crashes has not been evaluated with confidence. The WCLT provides greater separation between each lane of undivided traffic. The lines are painted as a dashed white line on sections of roads where passing is permitted, and a solid white line(s) in no passing areas. In Queensland, the traffic rule of a WCLT is the same as normal centerline markings. Where there is a double solid line marking or a double line marking where the solid line is closest to the traveling direction, overtaking is prohibited. A technical guideline and best practices were developed by the Queensland’s Department of Transport and Main Roads (TMR) and the WCLT has been implemented on a number of key roads where cross over centerline crash rates were high and existing road width accommodated such a treatment. This paper summarizes the main findings in Queensland. An initial finding from one evaluation project shows that WCLT could reduce casualty crashes by about 25%. However, there has potentially been an increase in runoff- road to left crashes which may require WCLT to be supplemented by ATLM and a recovery area.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 63-69
  • Monograph Title: Roadside Safety Design and Devices: International Workshop, March 26, 2015, Melbourne, Australia
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01675972
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Jul 24 2018 1:40PM