Development of breakaway utility poles

This paper describes an investigation of alternative schemes for in situ modification of existing conductor carrying and luminaire timber poles, with the objective of reducing the severity of vehicular impact while maintaining the integrity of the conductor cables. The feasibility of modifying Australian timber utility poles was investigated initially by a simplified mathematical model. The model results showed that significant reductions in collision severity could be achieved through pole modification. A 1:7.38 Scale model test facility was built to further investigate the breakaway utility pole concept. In all, 95 impact tests were conducted on a variety of pole modification schemes, configurations and timbers under a range of impact conditions. The test results confirmed the mathematical model predictions, and a simple pole modification scheme was developed that significantly reduced collision severity over the range of test conditions. Conductor cable tensions resulting from impact and pole breakaway remained well within the cable ultimate strength for both the single and two crossarm pole tests.


  • English

Media Info

  • Pagination: 202-19
  • Monograph Title: Procedures for analysis of traffic flow patterns using detector loops
  • Serial:
    • Volume: 10
    • Issue Number: 4

Subject/Index Terms

Filing Info

  • Accession Number: 01439200
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Aug 24 2012 10:04PM