What does a solid white line indicate?

A solid white line indicates that it separates lanes of traffic moving in the same direction. This means that while the lanes are divided, it is generally advisable to stay in your lane without attempting to change lanes, as doing so could create a dangerous situation. The presence of a solid white line serves as a guide for drivers to maintain their position within the lane and helps ensure smooth traffic flow.

In contrast, a broken white line would allow for lane changes, indicating that it is safe to move between the lanes when necessary, while a solid white line signifies caution and the need to stay within your lane. Designated bike lanes and the end of a particular zone would be indicated by different markings or signs and wouldn’t be represented solely by a solid white line.