Vancouver now is the second worst city on the planet in terms of traffic after Mexico City
For commuters the major obstacle to getting to their destination by car on time is the drivers, particularily truck drivers, who clutter up the left lane.
I am sure that if you are being followed by another vehicle, that unless you are turning left, you only used the left lane for passing another vehicle, your travel time to get to your destination would be reduced by 50%, and there would be a lot fewer accidents on the roads.