A downgrade steep enough or long enough to overheat brakes is ahead. Trucks take this sign personally; cars should too.
Slow before the descent and use a lower gear so the engine holds you back, instead of riding the brakes all the way down.
The truck tipping down the triangle is gravity’s invitation. Answer with a low gear, not the brake pedal.
Riding the brakes for the whole hill. Brakes that never rest overheat and fade, exactly when the hill is steepest.
Signs that live in the same family, or get confused with this one.
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