A single solid yellow line on a two-lane road marks what?

A single solid yellow line on a two-lane road marks what?

• A. It marks the center of the road.
• B. It marks the center of the road, and you may pass if there is no oncoming traffic.
• C. It marks a lane boundary for carpool lanes.
• D. It marks the center of a two-way road, and you should not pass into oncoming traffic.

Answer: (D)

A single solid yellow line on your side marks the center of a two-way road and tells you that you must not pass any vehicle in front of you. This line is a no-passing signal because it keeps traffic in opposing directions from moving into the same lane. It isn’t a carpool lane boundary, and you don’t pass simply because there’s no oncoming traffic—the solid line itself prohibits crossing to pass.

A single solid yellow line on your side marks the center of a two-way road and tells you that you must not pass any vehicle in front of you. This line is a no-passing signal because it keeps traffic in opposing directions from moving into the same lane. It isn’t a carpool lane boundary, and you don’t pass simply because there’s no oncoming traffic—the solid line itself prohibits crossing to pass.