What does it mean when there are two solid yellow lines in the center of the road?

When there are two solid yellow lines in the center of the road, it indicates that passing is not permitted in either direction. This marking serves as a clear indication that it is unsafe to attempt to overtake another vehicle, as it often signifies that the road may be winding or visibility is poor. The solid yellow lines are designed to help maintain safety by discouraging drivers from crossing into oncoming traffic, thus reducing the risk of collisions. Understanding this road marking is essential for safe driving practices, as adhering to it helps ensure the safety of all road users.