Despite the Knight_Street_Bridge opening in the 1970s for a seaport city, it wasn't designed to have 2 bus lanes & 2 truck lanes or even 2 emergency lanes. It was hardly designed with any future capacity in mind.
https://trafficcams.vancouver.ca/knightMarineBridge.htm
https://images.drivebc.ca/bchighwaycam/pub/html/www/695.html
https://trafficcams.vancouver.ca/knight.htm
https://jfdatalinks.blogspot.com/search?q=Knight+Street+Bridge