Safety impacts of auxiliary lanes at major/minor priority junctions outside built-up areas

Auxiliary lanes on the major road are usual elements of at-grade priority junctions on two-lane roads outside urban areas. Several studies confirmed the positive effects of the installation of one auxiliary lane, but only few of them examined the combined effect of more auxiliary lanes. In some cases auxiliary lanes, built for safety reasons, have the unintended negative effect, of causing unexpected, dangerous traffic situations for road users. Accident data of selected intersections with auxiliary lanes were collected and analysed. It was found, that the risk figures of the intersections are not decreasing with the increasing number of auxiliary lanes, unlike expected. Typical combinations of auxiliary lanes were identified, where the average risk figures were remarkably high. In order to decrease the potential negative effects, the paper gives recommendations for the conditions of using auxiliary lanes. Furthermore, the paper gives recommendations for their safer layout.


  • English

Media Info

  • Pagination: 10p
  • Monograph Title: Transport Research Arena (TRA) 2014 Proceedings

Subject/Index Terms

Filing Info

  • Accession Number: 01534606
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: VTI, TRIS, ATRI
  • Created Date: Aug 14 2014 10:16AM