What does the solid line marking on a highway mean?

The solid line marking on a highway is an important indicator used to communicate rules regarding passing other vehicles. When a solid line is present, it specifically indicates that drivers are prohibited from passing. This is often implemented in areas where passing could be particularly dangerous due to road conditions, visibility issues, or the proximity to intersections. The solid line serves as a clear and visual warning to maintain safety on the roadway, ensuring that drivers remain in their lanes and do not attempt to overtake other vehicles.

In this case, recognizing that a solid line means 'do not pass' is crucial for maintaining the flow of traffic and preventing accidents in high-risk areas. Understanding these markings helps drivers make safe decisions on the road and enhances overall road safety for all users.