Hawaii Drivers Permit Practice Test

What does a double solid white line mean on a four-lane highway?

1. May not be crossed.

2. May be crossed only with great care.

3. Is used to separate traffic moving in the opposite direction.

4. Are never used on highways.

The correct answer is: May not be crossed.

A double solid white line is a clear indicator that the lane you are in cannot be crossed. This marking emphasizes the importance of maintaining lane discipline and helps ensure the safety of all drivers on the road. When you see this line, it signifies the boundary between lanes of traffic that are heading in the same direction, and crossing it would generally be prohibited. The other options provide incorrect interpretations of what a double solid white line means. For instance, the idea that it may be crossed only with great care misrepresents the strict nature of the double solid line rule. Additionally, suggesting that it separates traffic moving in opposite directions is inaccurate, as that is typically indicated by different line patterns. Lastly, the assertion that double solid white lines are never used on highways is incorrect; they are, in fact, frequently utilized on highways to enhance traffic flow safety.