What does a double solid yellow line indicate?

A double solid yellow line indicates that no passing is allowed in either direction. This marking is instituted to enhance traffic safety by preventing vehicles from attempting to overtake one another in situations where visibility might be limited or where passing would be inherently dangerous, such as on hills or curves. The solid lines signal that drivers must stay in their lane without crossing over, maintaining a clear and safe roadway environment for all vehicles. This road marking serves as an important guideline to promote adherence to safe driving practices and reduce the likelihood of collisions associated with improper passing maneuvers.