What type of lane markings indicate that passing is prohibited?

Double solid lines are used to indicate that passing is prohibited. This is because they serve as a strong visual cue to drivers that it is unsafe or illegal to cross into the opposite lane to overtake another vehicle. These markings suggest that the road conditions, visibility, or other factors do not support safe passing, thereby enhancing the safety of all road users.

In contrast, dashed lines indicate zones where passing is allowed, and single solid lines could imply a restriction but are not as stringent as double solid lines. The option suggesting that all markings are acceptable fails to recognize the specific regulations that double solid lines enforce regarding safe driving practices. Thus, the presence of double solid lines serves as a clear directive to maintain position within the lane, ensuring better safety on the road.