How many seconds in advance should the car turn signal be turned on?

[SaraAnn]

Car turn signals should be activated 10-20 seconds in advance. Here is more information: 1. Activate turn signals in advance. When preparing to turn, turn on the signal early to give following drivers sufficient reaction time. However, the exact timing may vary depending on road conditions, traffic situations, and vehicle speed, but generally should not be less than 10 seconds. 2. Definition of turn signals. Turn signals are warning lights that alert surrounding vehicles and pedestrians to yield when a motor vehicle is turning. When activated, these lights flash repeatedly to attract attention and prevent traffic accidents.

[BriellaRose]

I remember that after driving for so many years, the recommended time to signal before turning is about 30 meters in advance, so that the cars behind have enough time to react. On highways or expressways where speeds are higher, it's best to turn on the signal at least 5 seconds in advance; in city traffic with slow-moving congestion, 3 seconds ahead is sufficient. Having driven in various road conditions, I've found that signaling early not only helps avoid rear-end collisions but also allows others to anticipate your actions, reducing accidents. When maintaining your car, don't forget to check if the turn signals are responsive—otherwise, a failure at a critical moment can be dangerous. Developing good habits is key to safe driving.

[DiJonathan]

From a practical perspective, the turn signal activation time is typically set between 30 to 50 meters before turning, or calculated by driving time - activating lights 3 to 5 seconds in advance is more reliable. This distance varies with speed: 30 meters suffices at low speeds, while higher speeds require earlier signaling. In my personal practice, such as urban driving, I usually glance at the rearview mirror before signaling; on highways, I estimate at least 40 meters in advance. I recommend checking your vehicle's lighting condition before each drive to avoid bulb failures causing delays. The essence of safe driving lies in anticipation and preparation.

[StAlexander]

Turn on the turn signal about 30 meters in advance. My driving instructor emphasized this when I was learning to drive. Check that the lights are working properly before driving out, and turn on the signal early before making a turn to let others know you're about to turn. Simply put, signal about 3 seconds in advance and make it a habit for safety. Don't wait until you're turning to signal, as it's too late and can easily lead to accidents.