Unfortunately, the BC part of Canada mostly has narrow, inadequate bridges.
https://en.wikipedia.org/wiki/Lions_Gate_Bridge The 3 lane joke that was never augmented with a bus and HOV tunnel. Especially, a train tunnel, because that actually might improve transportation efficiency.
https://www.dangerousroads.org/north-america/canada/6138-lions-gate-bridge.html
https://www.tranbc.ca/2019/08/29/how-the-lions-gate-bridge-counterflow-works/