What does a solid yellow line indicate?

A solid yellow line on the roadway serves a specific purpose related to traffic control. It indicates that no passing is allowed for vehicles traveling in either direction. This marking is typically employed on roads where visibility is limited or where it is unsafe to attempt to overtake another vehicle. Such situations may include areas with curves, hills, or other obstacles that could impede a driver’s ability to see oncoming traffic.

While passing zones can sometimes be marked with a dashed yellow line, a solid yellow line signals to drivers that it is important to stay in their lane and not attempt to pass. This is crucial for ensuring the safety of all road users by reducing the potential for head-on collisions and other dangerous driving situations.

The other options address different road-related scenarios that do not correspond with the meaning of a solid yellow line, thereby making it clear why the correct interpretation relates specifically to passing restrictions.