When is it not allowed to cross the white line drawn in the middle of the road?

Crossing a white line drawn in the middle of the road is typically restricted when that line is continuous. A continuous white line signifies that lane changes are prohibited to enhance safety; it indicates that the roadway is designed to maintain traffic flow in an orderly manner. Drivers should remain in their lanes and not cross this line unless it is an emergency situation that requires it. The presence of a continuous line means that there are specific legal and safety concerns in crossing that line, designed to prevent dangerous maneuvering or potential collisions.

Dashed lines indicate that crossing is allowed under certain circumstances, while the actions of other vehicles or poor road conditions do not constitute a rule about crossing the line itself. Therefore, understanding the meaning of the road markings is crucial for safe driving practices.