How far from a hill or curve should you not attempt to pass another vehicle?

When considering the safe distance from a hill or curve when attempting to pass another vehicle, the correct distance is 1/3 of a mile. This recommendation is based on the need for adequate visibility and reaction time when navigating areas where sightlines are obstructed. Hills and curves can severely limit your ability to see oncoming traffic, and passing in these situations increases the risk of a collision.

By maintaining a distance of 1/3 of a mile, drivers ensure they have enough space to gauge the traffic situation clearly and make informed decisions. The rule is designed to promote safety on the road and reduce the likelihood of accidents.