In typical driving rules, which situation is illegal for passing another vehicle?

• A. On a solid line
• B. On a straight road with clear visibility
• C. In a designated passing zone
• D. At intersections with a green light

Answer: (A)

The main idea here is how road markings govern when you can pass. A solid line on your side signals that crossing into the lane ahead is not allowed because it’s unsafe—there’s not enough visibility or there’s a higher risk of encountering oncoming traffic, pedestrians, or turning vehicles. So you must stay in your lane and not attempt a pass when you see that solid line.

If you’re in a designated passing zone or the road shows dashed lines, passing is permitted when it’s safe. A plain straight road with clear visibility isn’t automatically legal to pass; it depends on the line markings: dashed lines tell you you may pass; solid lines tell you not to. Intersections, even with a green light, require caution and generally aren’t an opportunity to pass because cross-traffic and turning movements create conflicts.