Safety Swing Arm to Prevent Collisions with Snow Plows

SNC Lavalin O&M is the company responsible for the operations, maintenance and rehabilitation of 275 kilometres of Trans-Canada Highway in New Brunswick; from the Quebec border to Longs Creek (west of Fredericton), and Route 95 between the United States border and Woodstock, until 2033. During its winter operations, SNC Lavalin O&M utilizes echelon plowing, the practice of staggering snowplows across all lanes of a multi-lane highway. By passing the ridge of snow from the lead snow plow to the following plow, echelon plowing makes it possible to clear accumulation from all lanes at once. It is, however, extremely dangerous for motorists to pass between or around the snowplows while in this formation, due to the possibility of whiteout conditions between the plow trucks. There is also the danger of impact with the back of the right side wing plow as it becomes obscured by snow. The number of collisions between motorists and the snow plow right wings was an issue even after many public awareness campaigns on the risks involved when passing between the plow trucks. After the last collision with injury to the plow operator in March 2013, and in the continuing effort to keep motorists as well as employees safe, SNC Lavalin O&M developed a “Safety Swing Arm”. The Safety Swing Arm consists of a 2.7 meter mechanical arm with high intensity flashing lights, installed on the back of the lead plow truck. When the right side wing plow is deployed, the arm simultaneously extends to create a further visual and break-a-way physical barrier between the motorists and the right wing plow. The Safety Swing Arm has been proven to prevent motorists from hitting the right wing while passing the plow during poor visibility conditions.


  • English

Media Info

  • Media Type: Web
  • Pagination: 1 PDF file, 11.2 MB, 9p.
  • Monograph Title: TAC 2018: Innovation and Technology: Evolving Transportation - 2018 Conference and Exhibition of the Transportation Association of Canada

Subject/Index Terms

Filing Info

  • Accession Number: 01683311
  • Record Type: Publication
  • Source Agency: Transportation Association of Canada (TAC)
  • Files: ITRD, TAC
  • Created Date: Oct 16 2018 2:06PM