Make each lane change deliberate
Road markings organize traffic. Good decisions combine those markings with signs, visibility, available space, and state rules.
Read the markings in context
White markings generally separate traffic traveling in the same direction; yellow markings generally separate opposing directions. Solid and broken lines have different meanings. Check the line on your side, posted signs, and your state’s rules before crossing.
Prepare before moving sideways
Signal, check mirrors, and check the blind spot before changing lanes. A signal communicates an intention; it does not reserve the space. Wait for a gap that lets you move without forcing another road user to react abruptly.
Keep a safe alternative
If you miss an exit, continue to the next safe route. Do not stop in a travel lane or reverse on a highway. If a passing maneuver cannot be finished with a clear view and adequate space, stay behind and wait.
A painted permission to move is only one condition. You also need visibility, space, and a safe path.
Use official road-safety resources and your state’s full handbook to check legal details and exceptions.
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