2021 Rail Transit Session
Using Friction Management to Improve System Performance and Reduce Life Cycle Cost on the Canada Line
Canada Line trains are powered by conventional rotary power applied to the wheel, and require consistent traction coefficient at the wheel-rail interface. Reduction in this traction coefficient at this interface results in wheels slipping/sliding relative to the rail surface which can have an impact on performance if a train has a timeout. Both reduction and an increase in this coefficient have negative long term impacts by causing an increase in wear and defects on both the wheel and rail. A trial was undertaken by the Operating Company with vendor support to outfit some trains with a Tread Stick Traction Modifying compound believed to create a consistent coefficient at the interface and provide a multitude of benefits in performance and wear.
This report outlines the trial phases, and the data measurement and analysis of the Tread Stick Traction Modifying compound supplied by the vendor. Improvements in the slip/slide performance, track noise monitoring, and wheel wear rate have demonstrated that there is a benefit to these Tread Sticks. These benefits justify equipping the entire fleet with tread sticks for a long term trial to test improved system resiliency, as well as potential running rail life cycle cost reductions.