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Difficulty: MediumMountain Driving and Steep Grades

When driving down a long, steep mountain grade, shifting your vehicle into neutral to coast downhill is both a safe driving technique and legally permitted.

Answer: Answer

Answer

The statement is False. Coasting down a steep grade in neutral is dangerous and illegal because it eliminates engine braking and causes brake overheating.
The statement is false because shifting into neutral disengages engine braking. Motor vehicle safety standards require drivers to select a lower gear prior to descending steep slopes to utilize engine drag and prevent brake failure.

Step-by-Step Solution

1
Evaluate vehicle control requirements on steep downhill grades.
Engine braking (achieved by remaining in gear or downshifting) is necessary to assist foot brakes in controlling vehicle speed.
Relying solely on service brakes during prolonged descents causes severe friction overheating.
2
Analyze the effect of shifting into neutral during a descent.
Disengaging the engine from the drivetrain forces the foot brakes to absorb all vehicle momentum.
This leads directly to brake fade, fluid boiling, and potential total brake failure.
3
Determine legal compliance under driver safety regulations.
Coasting in neutral or with the clutch disengaged on downgrades is strictly prohibited under standard vehicle codes.
Drivers are legally required to maintain full mechanical control of their vehicle at all times.

Key Concept

Engine Braking and Transmission Management on Downgrades
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Topics

Mountain Driving and Steep Grades

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