When I am riding at or faster than traffic speed I always get out of bike lane and fully take the lane. Sometimes I need to ride slower because of this, but I never pass on right.

The two places this happens are
1. The 15mph and no passing school zone - of course I am not going to pass cars on right going by going over speed limit
2. The 25mph residential street I ride with speed bumps every 100yrds. In this 1mi stretch cars generally drive ~20mph and slow to 15mph over bumps - which sometimes leads to situation where I would pass cars on right when they are going over bump, then they pass me between bumps, then I catch up again when they slow for bump, etc. I'll overtake cars on left if they are going too slow, but this has hazards too as there are possibilities for them to make left turns.

Al