Starting in 1981, 83 km of the Trans-Canada Highway (TCH) in Banff National Park were upgraded and mitigated, in phases, from two lanes to a four lane divided highway. TCH twinning project in Banff National Park addressed three ecological and transportation goals:

  1. Improve motorist safety
  2. Reduce highway-related wildlife mortality and habitat fragmentation
  3. Improve the flow of goods and services on Canada’s national highway.