What is the correct procedure for automatic transmission cars at traffic lights?
2 Answers
If the red light lasts for a relatively long time, such as more than 30 seconds—some urban intersections even have red lights lasting up to 99 seconds—it is generally recommended to shift to N (neutral) gear and then engage the handbrake. This allows the driver to release their foot for a brief rest and is also beneficial for energy conservation and environmental protection. Below are the relevant details: 1. If the traffic light duration is less than 20 seconds, there is no need to shift gears—simply press the brake pedal. If the traffic light lasts more than 20 seconds, it is advisable to shift to neutral and keep the foot on the brake. For durations exceeding 30 seconds, shifting to neutral is also an option, but the handbrake should be engaged. 2. When driving an automatic transmission car and stopping at a traffic light, it is best to avoid shifting to P (park) gear. P gear is intended for long-term parking when the engine is off. Engaging P gear locks the transmission gears, and in the event of a rear-end collision, the transmission could be damaged. Another reason is that P gear is positioned far from D (drive) gear, making switching cumbersome. Therefore, except for parking with the engine off, using P gear is not recommended in other situations.
When driving an automatic transmission car, I pay great attention to safe operations at traffic lights. Typically, I first press the brake pedal to ensure the vehicle comes to a complete stop, then quickly shift the gear to neutral (N position). This helps reduce the burden on the transmission and prevents engine overheating from prolonged idling in Drive (D) mode. Next, I engage the handbrake or electronic parking brake to add an extra layer of protection against rolling. When the light turns green, I immediately shift back to D, release the handbrake, and gently press the accelerator for a smooth start. This routine not only prevents accidental rolling but also protects the drivetrain and extends its lifespan, especially in congested urban driving. Developing this habit enhances overall driving safety. I recommend that beginners practice this procedure more to reduce accident risks.
