Which of the following is NOT true about an escape ramp?

Brake Failure on Downgrades.
Going slow enough and braking properly will almost always prevent brake failure on long downgrades. However, once the brakes have failed, you will have to look outside your vehicle for something to stop it.
Your best hope is an escape ramp. If there is one, there will be signs telling you about it. Use it. Ramps are usually located a few miles from the top of the downgrade. Every year, hundreds of drivers avoid injury to themselves or damage to their vehicles by using escape ramps. Some escape ramps use soft gravel that resists the motion of the vehicle and brings it to a stop. Others turn uphill, using the hill to stop the vehicle and soft gravel to hold it in place.
Any driver who loses brakes going downhill should use an escape ramp if it is available. If you do not use it, your chances of having a serious accident may be much greater.
If no escape ramp is available, take the least hazardous escape route you can—such as an open field or a side road that flattens out or turns uphill. Make the move as soon as you know your brakes do not work. The longer you wait, the faster the vehicle will go, and the harder it will be to stop.
[Commercial Driver's License Manual]