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Difficulty: Very hardDriving in Fog

If severely restricted visibility in dense fog forces you to pull completely off the highway onto the shoulder, you must immediately activate your four-way hazard flashers and leave your low-beam headlights and taillights illuminated to maximize your vehicle's visibility to approaching traffic.

Answer: Answer

Answer

False
According to official commercial driving safety protocols, if you must pull completely off the road due to heavy fog, you should turn on your four-way hazard flashers but turn OFF your headlights and taillights. In severely restricted visibility, approaching drivers often suffer from spatial disorientation and instinctively look for and follow the taillights of the vehicle ahead. If your standard driving lights remain illuminated while parked on the shoulder, another driver may mistakenly believe you are actively moving in a travel lane, pull in behind you, and crash directly into your parked vehicle.

Step-by-Step Solution

1
Identify the environmental hazard and the driver's corresponding maneuver.
The hazard is dense fog reducing visibility, and the driver is executing an emergency pull-off onto the shoulder.
This establishes the context for applying FMCSA emergency parking protocols.
2
Evaluate the proposed lighting configuration against official safety rules.
The procedure suggests using four-way flashers alongside low-beam headlights and taillights. The manual dictates using flashers but turning OFF headlights and taillights.
Comparing the scenario's action directly to regulatory standards determines the truth value of the statement.
3
Determine the safety consequence of the incorrect lighting configuration.
Leaving standard driving lights on creates an illusion of a moving travel lane, enticing other disoriented drivers to steer off the highway and rear-end the parked vehicle.
Understanding the hazard of following distance illusions in fog explains why the rule exists and confirms the statement is false.

Key Concept

Emergency Parking Lighting Procedures in Fog
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Topics

Driving in Fog

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