What is a one-way street?

1. Correct answer: A street in which traffic movement is permitted in one direction only.
2. A road with only one lane.
3. A roadway in which one direction of traffic is open for all vehicles while the opposite direction is limited to public vehicles only.
4. A dead-end road.

WhyA one-way road is one where traffic may move in one direction only. The number of lanes does not matter, and a dead end is something else.