A truck driver operating on a coastal highway observes a thick marine fog bank rolling across the corridor ahead, threatening to eliminate forward sight distance. In what chronological sequence should the driver execute the standard defensive driving and emergency shutdown procedures?
- 1Reduce road speed before entering the fog wall and ensure low-beam headlights are illuminated rather than high beams.
- 2Deactivate the auxiliary engine retarder switch and expand following distance to account for atmospheric moisture on the pavement.
- 3Signal intention and maneuver the commercial vehicle completely past the road shoulder into an off-highway parking area or designated rest facility.
- 4Apply the parking brakes, extinguish the driving headlights and taillights, and switch on the four-way hazard flashers.
Answer
The proper sequence begins with decelerating before entry with low-beam headlights on, followed by disengaging the engine retarder and lengthening following distance on wet pavement, maneuvering entirely off the roadway and shoulder into a parking facility, and finally setting parking brakes while extinguishing headlights and activating four-way emergency flashers.
The correct procedural order ensures the driver first controls vehicle dynamics and sight lines before entering the hazard (slowing down, using low beams), mitigates loss-of-traction risks en route (disengaging retarder, opening following space), safely leaves the travel corridor entirely rather than lingering on shoulders, and completes parking safety protocols by cutting driving lights while running four-way hazard flashers.
Step-by-Step Solution
Key Concept
Defensive speed adjustment, traction management, and off-road emergency shutdown sequence in dense fog
Estimated Time:2m 0s