A commercial combination vehicle is cruising on an open highway when the driver observes a dense fog bank settling across the roadway ahead. In what chronological sequence should the driver perform the following defensive driving actions, from initial approach to sustained navigation through the hazard?
- 1Reduce vehicle speed gradually and disengage the auxiliary engine retarder prior to penetrating the fog bank.
- 2Activate low-beam headlights and windshield defrosters while lowering instrument panel lighting to reduce interior glare.
- 3Substantially expand following distance and use the right-side fog line as a primary visual guide instead of tailing other vehicles.
- 4Continuously regulate travel speed so that total vehicle stopping distance remains well within forward sight distance.
Answer
The proper sequence begins with proactively slowing down and turning off the engine retarder before entry, followed by setting low-beam lights, defrosters, and dimmed dash displays upon entry, then expanding following distance while tracking the right fog line, and finally continuously regulating speed to ensure stopping distance never exceeds forward sight distance.
Safe navigation through adverse visibility conditions requires an orderly sequence: first, reducing speed and shutting off auxiliary retarders before entering the moisture-laden area to preserve traction; second, configuring proper vehicle lighting (low beams only and dimmed internal displays) to avoid reflective glare; third, establishing a safe spacing buffer while anchoring lane positioning to the right-side fog line; and fourth, continuously matching stopping distance to visible range throughout the hazard.
Step-by-Step Solution
Key Concept
Defensive driving sequence, auxiliary retarder management, lighting controls, and sight-distance regulation when encountering fog
Estimated Time:1m 15s