How long should you signal before turning or changing positions?

Signaling before making a turn or changing lanes is an important practice for ensuring safety on the roads. The recommended duration for signaling is approximately four seconds. This timeframe allows other drivers and pedestrians sufficient notice of your intentions, so they can respond accordingly. Signaling with adequate advance notice promotes better communication on the road, reducing the risk of accidents.

When considering the length of time to signal, four seconds strikes a balance between providing enough warning without being excessive. It gives surrounding drivers time to anticipate and adjust to your maneuver without causing confusion or hesitation. Effective signaling is a key component of defensive driving and helps maintain a smoother flow of traffic.