Question 6443
On a long downhill grade, how should you drive to do so efficiently and safely?
- With a gear selection such that, when you release the accelerator, the engine holds the vehicle back.
- Leaving the gear lever in neutral so the vehicle coasts downhill by inertia.
- Using the highest gears and pressing the brake frequently to reduce speed.
Show answer and explanation
Correct answer: With a gear selection such that, when you release the accelerator, the engine holds the vehicle back.
On a long downhill grade, use a gear that lets the engine hold the car back when you release the accelerator, and use the service brake only for additional braking. If the grade is steep, shift to a lower gear. Going downhill in a high gear and braking often heats up the brakes, making them less effective. In neutral, the car picks up speed because the engine no longer holds it back.