In highway design, what type of distance is associated with a safe transition during overtaking maneuvers?

• A. Decision Sight Distance
• B. Stopping Sight Distance
• C. Passing Sight Distance
• D. Intersection Sight Distance

Answer: (C)

Passing Sight Distance is the correct choice because it specifically pertains to the distance required for a vehicle to safely complete an overtaking maneuver on a highway. This distance takes into account the time needed for a driver to perceive an opportunity to pass, the time required to react, and the acceleration of the vehicle during the maneuver. It ensures that there is sufficient clear sight of the road ahead and the presence of oncoming traffic, allowing the driver to safely overtake another vehicle without undue risk.

In contrast, Decision Sight Distance is related to the distance at which a driver can identify and react to potential hazards or decisions required on the roadway, but it does not specifically pertain to overtaking. Stopping Sight Distance is about the distance needed to bring a vehicle to a complete stop in reaction to an obstacle, focusing on braking rather than overtaking maneuvers. Intersection Sight Distance, on the other hand, deals with visibility at intersections, ensuring that drivers can see other vehicles and pedestrians, but again, it does not address the specifics of overtaking situations. Thus, the unique requirements and considerations for safe overtaking maneuvers make Passing Sight Distance the most relevant choice.