What does a solid yellow line indicate?

A solid yellow line is a clear indication that passing is not allowed. This line serves as a visual cue to drivers that it is unsafe to overtake another vehicle in that area due to potential hazards, such as curves, intersections, or other conditions that may obstruct visibility. It is commonly used on roads to separate traffic moving in opposite directions, helping to maintain safety and minimize the risk of collisions. Understanding this traffic marking is crucial for safe driving practices, as it encourages adherence to traffic laws designed to protect all road users.