https://images.drivebc.ca/bchighwaycam/pub/html/www/70.html
https://vancouver.ca/streets-transportation/oak-street-sewer-separation-upgrades.aspx
Granville & Oak Street are both 6 lanes wide, but the Oak_Street_Bridge is only 4 lanes wide. Unfortunatly, back in the 1950s, the planners never allowed for 2 bus lanes, 2 truck lanes or even 2 wide emergency lanes. Thus, everything is crammed into only 2 lanes each way. Fortunately, most cities don't take such a congestive planning approach.