On narrow, single-tracked roads use passing places correctly:-
Pull into a passing place on your left, or wait opposite a passing place on your right.
Give way to vehicles coming uphill where possible.
Be prepared to reverse to the nearest passing place so that oncoming vehicles can pass.
Don't park in passing places.
Be careful of tractors, horse-riders and cyclists on the road ahead, slow down and leave plenty of room as you pass them.
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