Under night driving conditions, why must a commercial driver maintain a travel speed that allows the vehicle to stop within the distance illuminated by the headlights?
- ATotal stopping distance consists solely of vehicle braking distance, so headlight sight distance is only relevant after the brakes are applied.
- Any hazard beyond the headlight beam cannot be seen in time to complete perception, reaction, and braking before impact.Answer
- CHeadlight sight distance dictates the required minimum seconds of following distance behind another vehicle rather than stopping capability.
- DDriving faster than the headlight projection creates an optical glare barrier that blinds the driver inside the cab.
Answer
Any hazard beyond the headlight beam cannot be seen in time to complete perception, reaction, and braking before impact.
A driver must be able to stop within the distance illuminated by the headlights because total stopping distance includes perception distance, reaction distance, and braking distance. If a vehicle travels at a speed where its total stopping distance exceeds headlight range, an unlit hazard will only be seen when it is already too close to avoid a collision.
Step-by-Step Solution
Key Concept
Stopping within headlight sight distance (avoiding overdriving headlights)
Estimated Time:45s