The Yellowhead Highway is a major east-west highway connecting the four western Canadian provinces of British Columbia, Alberta, Saskatchewan, and Manitoba. Although part of the Trans-Canada Highway and the larger National Highway System, the highway should not be confused with the more southerly, originally-designated Trans-Canada Highway. The highway was officially opened in 1970. In the 1980s the green and white Trans-Canada logo began to be used to designate the roadway.