How far in advance should you signal before turning or changing lanes, and how long should you maintain the signal?

At least 100 feet before turning or changing lanes; maintain signal until maneuver is complete.

Giving other road users advance warning of your intended move is essential for safe driving. Activate your turn signal at least 100 feet before you turn or change lanes to give others time to react. Keep the signal on until the maneuver is complete so your direction and timing stay clear as you finish the turn or merge. Signaling too late or turning it off before you complete the maneuver can mislead others and increase the chance of a conflict.

50 feet before turning; switch off after you begin the maneuver.

Only after you start turning.

After you finish the maneuver.

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