When should you turn on a blinker?

When driving, turn signals should be activated at least 3 seconds in advance before changing lanes, turning, making a U-turn, or pulling over to the side of the road to clearly communicate driving intentions. For example, when turning left or changing lanes to the left, the left turn signal should be activated in advance and turned off promptly after completing the manoeuvre; when turning right or pulling over, the right turn signal should be activated in advance. Additionally, the left turn signal should be turned on before entering a roundabout, and switched to the right turn signal before exiting the roundabout. Standard use of turn signals not only avoids misleading other road users but also significantly improves driving safety. Especially in heavy traffic or adverse weather conditions, appropriately extending the activation time of turn signals can further ensure that intentions are clearly conveyed. Regular checks should be conducted to ensure that turn signals are working properly and their functions are intact.