9. A 4-way stop sign means: Traffic from all four directions must stop.

STOP There are four stop signs at the intersection.

The first vehicle to reach the intersection should move forward first.

4-WAY

All of the above

Traffic from all four directions must stop.

Explanation:

The four-way stop sign is also called as all stop sign in traffic management consists of stopping of all the vehicles for all the four directions at the same time of the intersection before crossing it .And was designed to have a low traffic volume and is commonly found in America, Africa and Canada.

It is nonrenuable which means that once you have used it, it's gone forever.