PBX Engineering are proud to have been the lead for this innovative new Intelligent Transportation System (ITS) project from conceptual design through to systems integration and commissioning. A special shout-out to the ATMS providers IBI, and these firms who contributed to the success of the construction of this project Mainroad Group, Bay Hill Contracting, Cobra Electric, Valid Manufacturing, and Protech Traffic Control.
Variable speed limits Systems (VSLS) are in operation on Highway 1 between the Sumas River Bridge in Abbotsford and the Prest Road overpass in Chilliwack to improve safety for drivers.
The speed limits on this section of highway are now adjusted based on real-time traffic and weather conditions.
The new traffic congestion-based system will adjust the speed limit to slow people down before traffic reaches a stop-and-go situation. The purpose is to calm and smooth out traffic to help reduce the high number of rear-end collisions caused by sudden changes in travel speed that occur on this busy section of Highway 1.
Two “gateway” dynamic messaging signs, one for each direction of travel on the highway, advise drivers they are entering the variable speed-limit corridor. These signs may also post road, weather or traffic-related information.
Along the corridor between the Sumas River Bridge and Prest Road overpass, the speed limit will be posted for drivers on more than 20 variable speed limit signs in each direction (on the shoulder and overhead).
Speed limits along this corridor are set based on data provided by traffic and road weather sensors installed along the highway. Traffic sensors are installed approximately every 500 metres to detect localized traffic conditions and collect traffic data. There are also multiple road/weather sensors that measure parameters, such as level of grip, visibility, temperature, and surface status.
Full release: https://news.gov.bc.ca/releases/2020TRAN0160-001907, and more information on the Highway 1 variable speed-limit system is available here: https://www.tranbc.ca/2020/11/03/abbotsford-to-chilliwack-drivers-have-a-new-way-to-stop-collisions/