When passing upwards on a hill how much clearance time will you need?

The required clearance time when passing upwards on a hill depends on factors like the steepness of the hill, visibility, and the speed of the vehicles involved. Generally, it's advisable to allow for at least a few seconds of extra time to ensure safety, especially if visibility is limited. Always consider the conditions of the road and the performance capabilities of your vehicle when determining the necessary clearance time.