What do double solid white lines on the road signify?

Double solid white lines on the road signify the separation of lanes moving in the same direction. This marking indicates that changing lanes is not permitted. Unlike double solid yellow lines, which separate traffic moving in opposite directions and prohibit passing, double solid white lines are specifically used to ensure that drivers remain in their designated lane while traveling in the same direction. This helps to maintain traffic flow and safety, emphasizing that the lanes are intended to keep vehicles organized and prevent any unsafe lane changes. Understanding this marking is crucial for adhering to road rules and ensuring the safety of all road users.