With so many narrow streets & bridges in Vancouver, its difficult to have a proper HOV lane network, especially for the metropolitan region.
https://en.wikipedia.org/wiki/High-occupancy_vehicle_lane
https://www.drivesmartbc.ca/lanes/using-hov-lanes
https://en.wikipedia.org/wiki/High-occupancy_vehicle_lane#Canada
https://en.wikipedia.org/wiki/High-occupancy_vehicle_lane#New_Zealand_and_Australia