What does a double yellow line indicate?

A double yellow line indicates that no passing is allowed in either direction. This road marking is used to help ensure the safety of drivers and passengers by preventing them from crossing into oncoming traffic when trying to overtake another vehicle. The presence of double yellow lines signifies that the roadway is considered hazardous for passing due to factors such as visibility issues, curves, or proximity to intersections.

It's important to recognize that while a single yellow line might imply certain passing restrictions or allow for passing under specific conditions, double yellow lines create a strict barrier against overtaking, enhancing traffic safety. This rule applies regardless of the direction of travel, meaning that vehicles in both lanes are prohibited from crossing these lines to pass other vehicles. The other options suggest rules that do not accurately reflect the specific regulations established by the presence of double yellow lines on the roadway.