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 Texas handbook says broken or dashed lines allow you to pass or change lanes when conditions are safe. It also warns that you should not cross a broken line if it is not safe. A dashed white line is therefore a permission line, not a guarantee that you can cross it at any moment. The passages do not tie this to daylight or to motorcycles.
Why the other answers are wrong
- A. At any time. — At any time is wrong because the handbook makes crossing a broken line conditional on it being safe.
- B. Only during daylight hours. — Only during daylight hours is wrong because the passages place no daylight restriction on dashed lines.
- D. Only when passing a motorcycle. — Only when passing a motorcycle is wrong because the passages allow passing or changing lanes across broken lines, not a motorcycle-only exception.
Remember it
A dashed line says maybe; your mirror and clearance say yes.
Official handbook: Texas Driver Handbook (DL-7), Chapter 5: Signals, Signs, and Markers , p. 34