What does a double solid line mean on the road?

A double solid line on the road indicates that crossing the line is prohibited. This is a clear traffic control device used to signify that vehicles must not move from one lane to another across these lines. The purpose is to enhance safety by preventing drivers from making turns or lane changes in areas where it might be dangerous, such as near intersections or in areas of poor visibility. This marking helps maintain a flow of traffic and ensures that drivers remain within their designated lanes, reducing the likelihood of accidents.

The other options suggest varying levels of permission to cross the line, which do not apply when a double solid line is present. These lines are strict in their indication that crossing is not allowed at any time.