What do double yellow lines indicate on the road?

Double yellow lines on the road signify that no passing is allowed in either direction. This road marking is often found on two-way streets where visibility might be limited, or where it is unsafe to cross the center line. It is designed to enhance safety by preventing vehicles from overtaking each other, which could lead to dangerous situations, such as head-on collisions.

The presence of double yellow lines therefore serves as a clear visual cue to drivers that they should remain in their lane and not attempt to pass other vehicles. Understanding this rule helps maintain orderly traffic flow and ensures safety for all road users.