What do double solid yellow lines signify?

Double solid yellow lines indicate that all vehicles are prohibited from crossing the lines in either direction. This is a traffic control measure designed to enhance safety by preventing overtaking and passing in areas where visibility might be limited or where road conditions suggest that passing could be hazardous. These lines are commonly found in areas such as two-lane roads with heavy traffic, near intersections, or in places where there's a high likelihood of accidents.

The presence of double solid lines clearly communicates to drivers that they should remain in their lane and not cross over to the other side, reinforcing the importance of caution in specific driving situations. Understanding this traffic marking is crucial for safe driving practices and adherence to the rules of the road.