When driving downhill, you should use the service brakes _________.

Before starting down the grade:
- Downshift as needed to help control engine speed and test brakes by gently applying the foot brake to ensure they are functioning properly. As your vehicle moves down the grade, continue checking traffic in all directions, stay in the right-most or curb lane and, if legal to do so, use the four-way flashers if your vehicle is moving too slowly for traffic.
- Increase following distance and observe the following downhill braking procedures:
+ Select a safe speed, one that is not too fast for the weight of the vehicle, length and steepness of the grade, weather and road conditions.
+ Once a safe speed has been reached, apply the brake hard enough to feel a definite slowdown.
+ When speed has been reduced to 5 mph below the safe speed, release the brakes. (This application should last for about three seconds.)
+ Once speed has increased to the safe speed, repeat the procedure.