Panneaux routiers
A yellow warning sign showing a truck on a downhill grade (e.g., '8%') means:
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Bonne réponse : B. A steep downgrade ahead — adjust speed and increase following distance
Percent grade tells you how steep. 6% is moderate; 10% is severe. Engine braking (lower gear) helps trucks. Cars should watch for trucks using run-away ramps or slower traffic.