Have you ever touched on the subject of drivers doing 5 to 15km below the posted speed limit? It's extremely annoying. The passing lanes are usually not available due to Murphy's Law, and the 4 lane stretches are great when you find one, but never when you need them! And the oddest thing happens on these 4 lane stretches; the folks who were going under the speed limit suddenly go 'over' the speed limit!
I will add one observation to this reader's, and that is drivers of vehicles like these either have never used their rear view mirrors or are completely oblivious of the parade behind them.
Slow driving is different in law than speeding. With speeding, if you are over the limit you are in breach of the law. However, if driving under the speed limit is necessary for the safe operation of your vehicle you have an excuse for impeding traffic. That is, until an officer tells you to speed up or to remove your vehicle from the highway until the officer gives permission to continue.
In short, there is no offence in driving slowly unless you do not have a safety reason or are driving contrary to the officer's instructions.
This brings us to courtesy and self preservation. Obstructing traffic will eventually provoke someone into passing, perhaps in a manner that is dangerous due to their impatience. If you have to drive slowly, keep an eye on those behind. Pull off the road and stop frequently to let others by and then continue at the pace you require to be safe.
When I did speed enforcement I allowed the same room under the speed limit that I allowed over it. I also kept an eye on advisory signs and rarely found a driver outside on the low side but frequently found them outside on the high side. Some slow driving complaints may be made by drivers who need to relax a bit behind the wheel themselves.
- Section 145 MVA - Slow Driving.