When is it permissible to cross double solid lines?

Crossing double solid lines is not allowed under any circumstances. The purpose of double solid lines is to indicate a no-passing zone, which helps ensure safety by preventing drivers from attempting to overtake vehicles in areas where it could be dangerous or difficult, such as curves, intersections, or areas with limited visibility. Adhering to this rule is critical for maintaining safe driving conditions, as it helps reduce the risk of accidents that could arise from improper lane changes or passing maneuvers. Therefore, the correct answer reflects the importance of respecting traffic markings and their associated regulations.