What do two horizontal, solid yellow lines mean on the road?

Two horizontal, solid yellow lines on the road indicate that no crossing or passing is allowed. This marking serves as a clear visual warning to drivers that they must remain in their lane and not attempt to overtake another vehicle. The solid nature of the lines emphasizes the restriction, signaling to drivers that it is unsafe to depart from their lane in that area. This could be due to various reasons, such as limited visibility, sharp curves, or proximity to intersections, where attempting to pass could create unsafe conditions.

Understanding this traffic marking is crucial for maintaining safety on the road. Drivers must adhere to these guidelines to prevent accidents and ensure a smooth flow of traffic. In contrast, other markings or road signs may indicate different driving behaviors, such as passing or turning, but solid yellow lines specifically communicate a strict prohibition against crossing.