This road sign means:
This sign indicates：
Drivers are required to stop their vehide:
Alcohol causes:
To enter a freeway:
Regulation signs normally are:
When a traffic signal light turns green,you should:
You may avoid the risks of alcohol-related crashes by.
A thumping sound can be a warning:
To avoid the need to make emergency stops while driving in traffic,drivers should:
When in a motor vehicle on a highway.it is:
When driving in bad weather, drivers should
Don't follow other cars too closely because:
If your car breaks down on a highway. you should
It's 10 AM. This sign tells you that:
