What road marking indicates a no-passing zone?

A solid yellow line on your side of the road indicates a no-passing zone. This road marking is designed to communicate clearly to drivers that they should not attempt to overtake other vehicles in that area. The solid yellow line signifies that visibility is likely limited or that it may be unsafe to change lanes due to potential oncoming traffic.

In contrast, dashed lines—whether white or yellow—often indicate that passing is permitted when safe to do so. A dashed white line is used to separate lanes of traffic moving in the same direction, allowing for lane changes. A solid white line typically serves to mark the edges of lanes or the outer lanes of the roadway, where crossing is discouraged but may not be as strictly enforced as with a solid yellow line. Recognizing the significance of these markings is crucial for safe driving and maintaining proper traffic flow.