Well since this thread has drifted to include just about all drivers of just about all vehicles, a few observations from the last 2 days spent driving around the beautiful island of Mull, where many of the roads are "single track with passing places". Nothing vehicle-specific as far as I could see, unless you count the wee white Fiats and Minis who seem to think they should be able to slip through anywhere. So who stops? Who backs up? Who looks far enough ahead to anticipate passing issues? Most people were well-behaved, with the exception of one woman in a "Chelsea tractor" who stood her ground and would not back up about 20 yds into a passing place, whereas my husband had to reluctantly go back several hundred yards to let this belligerent woman through, who then did give a leery smile!