As a commercial driver heading into a valley, you observe thick fog rolling across the highway that drastically limits forward visibility. Arrange the following defensive driving actions in the correct sequential order required by standard commercial motor vehicle safety procedures.
- 1Ease off the accelerator to decelerate smoothly and check rearview mirrors before applying gentle service braking to prevent being struck from behind.
- 2Confirm low-beam headlights and all marker lights are active while turning off auxiliary braking retarders to eliminate drive-wheel lockup on moisture-slicked roads.
- 3Expand following distance significantly and guide vehicle tracking using the right-side white pavement line rather than staring into oncoming traffic.
- 4Identify the nearest commercial rest area or designated parking facility to exit the roadway completely until atmospheric conditions clear.
Answer
The correct procedural order begins with gradual deceleration and mirror checks, followed by setting low-beam lights and disabling engine retarders, then extending following distance while tracking right-edge road markings, and finally exiting the roadway entirely at a safe commercial parking facility.
The correct sequence prioritizes immediate speed control and situational awareness first, followed by stabilizing vehicle equipment (low beams on, retarders off to prevent skidding on slick pavement), then establishing defensive lane positioning using right-side pavement markings and expanded headway, and finally securing the vehicle completely off the highway at an established rest area or truck facility.
Step-by-Step Solution
Key Concept
Defensive driving protocols and sequential hazard management when operating a commercial vehicle in dense fog.
Estimated Time:1m 30s