https://en.wikipedia.org/wiki/High-occupancy_vehicle_lane
https://www.witpress.com/Secure/elibrary/papers/UT06/UT06019FU1.pdf
https://ec.europa.eu/transport/road_safety/going_abroad/united_kingdom/forbidden_lane_en.htm
https://academic-accelerator.com/encyclopedia/high-occupancy-vehicle-lane
https://en.wikipedia.org/wiki/High-occupancy_vehicle_lane#Canada
There has been a tremendous level of reluctance to build a series of HOV, bus & bike bridges in the Greater Vancouver region.
https://dailyhive.com/vancouver/metro-vancouver-traffic-second-worst-north-america
This combined with such a narrow road network helps to make sure that Vancouver continues to be one of the most congested cities in the developed world.