If two vehicles of similar size meet on a hill, which one has the right of way?

When two vehicles of similar size meet on a hill, the vehicle going downhill is required to yield the right of way. This rule is in place because a vehicle traveling downhill has the potential for greater speed and may be less controllable, especially if the road is steep. The vehicle going uphill generally has more control and can maneuver to a safe stopping position or pull over if necessary.

This traffic regulation is designed to promote safety by reducing the risk of accidents on inclines where visibility may be limited. The downhill vehicle is considered to have the responsibility of yielding because it has less ability to stop safely without risking a potential sliding situation. Hence, when encountering another vehicle on a hill, the one going downhill should always yield the right of way to ensure a smoother and safer passage for both drivers.