Which of the following describes the meaning of a dashed line on the roadway?

• A. You must not change lanes.
• B. The dashed line means you should stop.
• C. You may change lanes when it is safe; it separates lanes moving in the same direction.
• D. You may change lanes whenever you want, as long as you think it's safe.

Answer: (C)

Dashed lines between lanes moving in the same direction indicate that lane changes are allowed when it’s safe. They show that the lanes are traveling in the same direction, and you may move from one lane to the other as long as you signal, check mirrors and blind spots, and ensure there’s a safe gap. This contrasts with solid lines, which typically prohibit crossing. The idea isn’t that you can change lanes at any time or without regard to traffic; you must still judge space and safety before maneuvering. That’s why the best description is that you may change lanes when it is safe; it separates lanes moving in the same direction.