What Constitutes a Solid Line Violation?

[Carvalho]

Wheel crossing over a solid line is considered a solid line violation. Solid lines are divided into yellow/white types. During straight driving, vehicles must not cross these lines—whether they are solid, dashed, yellow, or white—and must stay within their lane. This is a safety requirement aimed at preventing traffic accidents. White dashed lines indicate lane changes are permitted, while white solid lines prohibit lane changes. A single yellow line allows crossing for overtaking, whereas double yellow lines strictly forbid crossing for overtaking. Solid Lines: A single solid or dashed line indicates a unidirectional single-lane road, while double solid lines indicate a unidirectional road with two or more lanes. Identifying Lane Solid Lines: Generally, roads marked with a single solid line are not very wide. If two vehicles attempt to pass side by side, it becomes crowded. A white solid line is often added on the right to separate motor vehicle lanes from non-motorized vehicle lanes, primarily to warn vehicles against crossing the line for overtaking. Roads marked with double yellow solid lines are typically wider, usually featuring at least two lanes per direction plus a white solid line separating motorized and non-motorized lanes. The wider road makes it harder for drivers to distinguish lanes when turning or passing intersections. Using a single yellow line in such areas could lead to wrong lane usage, whereas double yellow lines make lane identification much clearer.