How far in advance must a driver signal before changing direction in most states?

In most states, drivers are required to signal at least 100 feet before changing direction. This distance allows enough time for other drivers and pedestrians to notice the intended maneuver, ensuring safety and promoting smoother traffic flow. Signaling in advance is essential for effective communication on the road; it warns other road users of your intention to turn or change lanes.

While some jurisdictions may have differing requirements, the 100-foot rule is widely adopted as a standard, providing a balance between sufficient warning and practicality for drivers. This distance translates to approximately three to four seconds at typical driving speeds, giving adequate time for response. Understanding this requirement reinforces the importance of signaling not just for compliance with laws, but for the safety of everyone on the road.