Which line marking indicates no passing from either direction?

• A. Dashed yellow line
• B. Solid white line
• C. Double solid yellow line
• D. Solid yellow line

Answer: (C)

Double solid yellow lines signal a no-passing zone for traffic in both directions. Crossing to pass another vehicle is illegal here because the road conditions—such as limited sight distance, curves, or upcoming intersections—make it dangerous. You should stay in your lane and not cross the lines to pass. If you need to turn left, you may do so across the line only where allowed (such as at permitted driveways or turns) and when it’s safe. This is different from a dashed yellow line, which lets you pass when the way is clear, or a single solid yellow line, which bans passing in your direction, not in both. A solid white line marks lane boundaries or edges, not passing rules.