When should you use your turn signal and for how long before changing lanes?

When should you use your turn signal and for how long before changing lanes?

• A. Use signals only after you have completed the lane change
• B. Use signals before you have started the lane change
• C. Use signals only when there is traffic in the adjacent lane
• D. Use signals well before changing lanes and for the entire maneuver; activate at least 3–5 seconds before.

Answer: (D)

Giving other drivers advance notice of a lane change is essential for safe driving. You should use your turn signal well before you start the maneuver and keep it on for the entire move so others have time to notice, anticipate, and adjust their speed or position. A good rule of thumb is to activate the signal at least 3–5 seconds before you begin the lane change and keep it on until you have fully merged into the new lane and are stabilized there. This helps prevent surprise moves, reduces the chance of last‑minute braking, and communicates your intention even if there’s no obvious traffic in the adjacent lane. Signals are a part of the process whenever you plan to move laterally, not only when there’s heavy traffic.

Giving other drivers advance notice of a lane change is essential for safe driving. You should use your turn signal well before you start the maneuver and keep it on for the entire move so others have time to notice, anticipate, and adjust their speed or position. A good rule of thumb is to activate the signal at least 3–5 seconds before you begin the lane change and keep it on until you have fully merged into the new lane and are stabilized there. This helps prevent surprise moves, reduces the chance of last‑minute braking, and communicates your intention even if there’s no obvious traffic in the adjacent lane. Signals are a part of the process whenever you plan to move laterally, not only when there’s heavy traffic.