When driving at night on a road with lanes, you must be able to stop in half the length of clear road you can see in front of you. True or false?
C. Only when it's wet
The correct answer is B
Correct. You must be able to stop in the full length of the road you can see in front of you. However, if the road has no lanes, you should be able to stop in half the length of the road you can see ahead.
The reason for the difference between a laned and unlaned road is this:
If you are driving in a road with lanes, each vehicle should have its own lane. If you need to stop, it's unlikely that there will be another vehicle coming towards you in your lane. If you are driving on an unlaned road it's likely to be a narrower rural road. This means that vehicles coming towards you could be partially in your lane. You must be able to stop and the other vehicle must be able to stop, too, therefore the distance is halved.
Unlaned roads are often of poorer quality road surface, too, and therefore stopping distances are likely to be longer.