What does a solid yellow line indicate on a roadway?

A solid yellow line on a roadway serves as an important traffic control measure that indicates that passing is prohibited. This means that vehicles are not allowed to cross the solid yellow line to overtake another vehicle. The primary purpose of this line is to ensure safety by indicating areas where visibility is limited or where it would be dangerous to pass due to curves, hills, or other factors.

The use of a solid yellow line is crucial in maintaining safe driving practices. It helps to prevent accidents that can occur when drivers attempt to pass in areas where it is not safe to do so. This regulation helps drivers make informed decisions about when it is appropriate to change lanes or pass another vehicle.

The other options do not accurately reflect the purpose of a solid yellow line. For example, a line that permits passing would be marked differently, such as a dashed yellow line. Similarly, markings that indicate the edge of the roadway or designate pedestrian lanes are typically of different colors or styles, further clarifying the specific use of roadway markings for drivers.