What does a solid yellow line indicate?

A solid yellow line indicates that passing is prohibited. This marking is used on highways and roads to warn drivers that they should not attempt to pass other vehicles in this area. The solid line serves as a clear visual cue to maintain safety by preventing overtaking where it may be dangerous or illegal to do so.

In contrast, a broken yellow line would indicate that passing is allowed when safe to do so. The other options do not pertain to the indication of a solid yellow line; for example, pedestrian-related markings or construction signs serve different purposes and are represented by distinct symbols or lines.