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Idaho Class D Knowledge Practice Test
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Passing target: 85% (34/40)
Freeways & High-Speed RoadsStandalone practice
How should you control speed on a long, steep mountain downgrade?
Correct answer: Use a lower gear; never coast in neutral
Why
A lower gear uses engine braking and reduces heat buildup in the service brakes; coasting removes that control.
Verified against Idaho Driver’s Handbook, July 2026 · Controlling speed downhill · p. 107
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