Question:
When descending a long downgrade, what is the “safe speed”?
1. The posted limit for that road
2. The minimum speed you should employ
3. Whatever speed other vehicles are using, not above the posted limit
4. Your chosen maximum speed, not above the posted limit
Explanation
Your safe speed on a downgrade is the one you have chosen as your maximum. You should gently brake to 5 miles an hour below it, then gradually let the speed build up. When you reach your safe speed, brake again, and repeat throughout the downgrade.