Should You Shift to Neutral at Traffic Lights with an Automatic Transmission?

[NevaehAnn]

It is recommended to shift to neutral when waiting at traffic lights with an automatic transmission car. If the wait is prolonged, you can also engage the handbrake. Here are some relevant details: 1. When waiting at a red light, shifting to N (neutral) for a short period is fine, but leaving it in N for an extended time can damage the car, especially the transmission. 2. Keeping the car in D (drive) while pressing the brake at a red light is equivalent to pressing both the accelerator and brake in a manual transmission car. In this scenario, fuel consumption increases, and over time, the torque converter remains under stress, accelerating wear on components like the torque converter. 3. It is not advisable to shift to P (park) while waiting at a red light. Firstly, shifting to P without engaging the handbrake can cause damage to certain components. Secondly, starting from P involves more cumbersome steps. Thirdly, frequently shifting to P can lead to gear grinding in the automatic transmission, damaging the transmission bearings.

[StJosephine]

When stopping at traffic lights in an automatic transmission car, whether to shift to neutral or not, as a veteran driver with over 20 years of experience, I prefer to decide based on the situation. In the past, older cars lacked modern features, so for long red lights (e.g., more than half a minute), I would shift to N (neutral) to save a bit of fuel, reduce engine load, and minimize wear, but I always made sure to firmly press the brake to prevent rolling. Nowadays, new cars come with automatic start-stop systems that shut off the engine at red lights, saving fuel more efficiently, so I rarely shift to neutral and let the car handle it itself. For short red lights lasting just a few seconds, there's no need to bother—frequent shifting can actually wear out the transmission. The key is to ensure safety; don’t take risks just to save a little money. For prolonged stops, shifting to neutral is fine, but it’s best to engage the handbrake as a precaution. Overall, developing a habit that’s convenient and reassuring is the way to go—don’t overcomplicate things.

[DianaLynn]

Having driven various car models for years, I feel that automatic transmissions generally don't require shifting to neutral at red lights. Modern car designs are very intelligent, especially those with auto start-stop systems. The engine automatically shuts off at red lights and restarts quickly, which is much more efficient and fuel-saving than manually shifting to N gear. I often drive a new SUV myself - just keeping it in D gear while braking is enough, no need to bother with gear changes. For exceptionally long waits like at railway crossings, I occasionally shift to N gear but always engage the handbrake to prevent rolling. The fuel-saving effect isn't noticeable and actually increases wear - better to maintain the system well. The joy of driving lies in smooth operation - worrying less about details and maintaining a relaxed mindset is most comfortable. Environmentally speaking, new systems reduce emissions more directly and effectively.

[DelAvery]

As someone who cares about energy conservation and environmental protection, I support shifting to neutral at traffic lights for automatic transmissions. Putting it in N gear reduces engine idling fuel consumption and lowers carbon emissions. I've developed the habit of shifting to neutral even at short red lights to cultivate a fuel-saving mode. With the brake properly engaged, there's minimal risk—every little bit of savings counts. The start-stop function in new cars complements this practice even better. Saving money while being eco-friendly—small actions add up over time.

[AdelynAnn]

Safety first, I firmly oppose shifting to neutral. When stopping at a red light with an automatic transmission, keeping it in D gear while stepping on the brake is the safest way to prevent rolling. Shifting to N gear can easily lead to accidental sliding, especially on slopes, increasing the risk of accidents—I've seen severe consequences firsthand. Let the car's system handle minor fuel savings; there's no need for manual intervention. Maintaining gear control in all situations to ensure safety is worth it—never take unnecessary risks.

[MacTessa]

Understanding the internal principles of cars, I believe that shifting to neutral at red lights requires weighing the pros and cons. Shifting to N gear can reduce engine torque, saving 5%-10% on fuel consumption and extending the lifespan of transmission oil. However, frequent gear shifts wear out components, especially in automatic transmissions. For short stops of around ten seconds, staying in D gear is sufficient. For longer stops exceeding 30 seconds, shifting to N is acceptable but must be accompanied by the handbrake to prevent slipping. Start-stop systems are more efficient. The balance point: on flat roads, long waits in N save fuel; on uneven terrain, staying in D prioritizes safety for simpler handling.