Under what conditions is it obligatory to operate a “speed retarder” while driving downhill?

Choose an answer to test yourself:

1. AWhen a “warning sliding” sign is placed on the road.
2. BWhen the slope rate of the decent exceeds 6% and the length of the decent is more than one kilometer.
3. CWhen the vehicle is equipped with a speed retarder and a sign warning about a dangerous descent is placed on the road.
4. DIf a vehicle is equipped with a speed retarder, it should always be operated, also while driving on plane surfaces.

Topic: Traffic Rules · עברית