What does a single solid white line mean?

A single solid white line on the road signifies that lane changes are discouraged. This marking indicates that while it's possible to cross the line, drivers should do so with caution and only when it is safe to do so. The purpose of this line is to maintain traffic flow and ensure safety, particularly in areas where lane changes could lead to conflicts or accidents.

In contrast, other markings convey different meanings; for instance, a dashed line would indicate that lane changes are allowed, while a solid line paired with specific signs would instruct drivers to stop or be aware of speed limits. Understanding these signals is crucial for safe driving and compliance with traffic regulations.