The Cushing+Bridge is a little like a typical narrow 4 lane bridge in backwards Vancouver. However, unlike Vancouver, Calgary built a 2 lane bus-bridge next to the 4 lane Cushing+Bridge. This is how properly dedicated bus lanes can be built next to an existing narrow BC type bridge.
Calgary is the biggest city in Western Canada. Vancouver is a small city in area and has less than a million people. However, Greater Vancouver and the BC Lower_Mainland, almost has more people than Calgary, Edmonton and Winnipeg combined.
https://en.wikipedia.org/wiki/Calgary#Infrastructure
http://albertaroads.homestead.com/Calgary/plans/BowTrail/BowTrailDToverview.jpg
http://albertaroads.homestead.com/Calgary/plans/index.html
A 4 track freight train set of bridges in Calgary is no problem, but in Vancouver and the metropolitan region, most of the freight train bridges still only have a single track. By now the Greater Vancouver region should have double track freight bridges and double track commuter train bridges.
https://jfdatalinks.blogspot.com/search?q=Cushing+Bridge+in+Calgary
