You may drive across a dashed white line:
- At any time.
- Only during daylight hours.
- When it is safe to change lanes. ✓
- Only when passing a motorcycle.
Answer: C. When it is safe to change lanes.
You may drive across a dashed white line when it is safe to change lanes.
Why this is the answer
The handbook says white lines separate lanes of traffic moving in the same direction. It also says a single broken line means you can pass other vehicles or change lanes if you can do so safely without interfering with traffic. A dashed white line is that kind of broken line, so the permission is tied to safety and traffic conditions, not to a time of day or a particular type of vehicle.
Why the other answers are wrong
- A. At any time. — A dashed white line does not mean you can cross at any time; the handbook ties crossing it to doing so safely and without interfering with traffic.
- B. Only during daylight hours. — The handbook does not make crossing a dashed white line a daylight-only rule; it ties the move to safety and traffic conditions.
- D. Only when passing a motorcycle. — The handbook does not limit crossing a broken line to passing motorcycles; it allows passing or changing lanes when it is safe.
Remember it
Think of a broken white line as permission for a safe lane change, not unlimited crossing.