What does a dashed white line between lanes allow you to do?

• A. Always stay in your lane.
• B. Pass or change lanes when safe to do so.
• C. You must never change lanes.
• D. Only pass on the right.

Answer: (B)

A dashed white line between lanes tells you that changing lanes or passing is allowed, as long as you can do so safely. This marking means you’re free to move to the adjacent lane to pass a slower vehicle or to prepare for a maneuver, but you must not cross if it would endanger anyone or if conditions make it unsafe.

Before changing lanes, signal your intention, check your mirrors and blind spots, and ensure there’s a clear, safe gap in traffic. Also be mindful of any signs or road markings that forbid passing in certain areas, and don’t cross the line in poor visibility or in heavy traffic.

Passing is typically done on the left on multi-lane roads; the option that says you must pass only on the right isn’t correct in normal driving conditions. You’re not required to stay in your lane indefinitely, and you’re not barred from changing lanes when it’s safe.