An Extended and Updated Technical Evaluation of Wig-Wag Signs at the A83 Rest and be Thankful

The Scottish Road Network Landslides Study made a number of recommendations for landslide management and mitigation. Amongst these was that ‘wig-wag’ signs could be suitable at sites with specific conditions, particularly those sites at which debris flow events occur on a regular basis. Such signs incorporate a standard rockfall/landslide red warning triangle, flashing lights, and a sub-plate that that warns of ‘Higher risk when lights flash’. A trial of such signs commenced on the A83 in 2011 and was centred on the section of the route that includes the Rest and be Thankful. As part of this trial it was intended that a detailed technical and perceptual evaluation of the signing arrangements be undertaken. An initial technical evaluation, after two years of operation, and a perceptual evaluation were undertaken. This report extends and updates the technical evaluation to four years of operation and examines the efficacy of the operation of the wig-wag signing arrangements at this location. The evidence presented in this report supports the continued use of the wig-wags and the continued promulgation of messages about desired behaviours to the non-local driver target audience.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Maps; Photos; References; Tables;
  • Pagination: 41p

Subject/Index Terms

Filing Info

  • Accession Number: 01643922
  • Record Type: Publication
  • ISBN: 9781910377741
  • Report/Paper Numbers: PPR743
  • Contract Numbers: TS TR MFA 2012-021
  • Files: TRIS
  • Created Date: Aug 22 2017 9:22AM