What does a solid yellow line on the road indicate?

A solid yellow line on the road signifies that passing is prohibited. This marking is meant to enhance safety by indicating that it is unsafe to overtake another vehicle in that area. It typically appears in scenarios where visibility is limited or where the roadway is winding, suggesting a higher risk of collision if a driver attempts to pass. In contrast, other road markings such as a broken yellow line indicate that passing is allowed, while a solid white line designates lanes where lane changing is discouraged. Understanding these road markings is essential for safe driving practices and compliance with traffic laws.