Will the speed of an automatic transmission car decrease if the accelerator is not pressed?

[Judith]

Will the speed of an automatic transmission car decrease if the accelerator is not pressed? The reasons for the speed decrease when not pressing the accelerator and the speed without pressing the accelerator are as follows: Reasons for speed decrease when not pressing the accelerator: When an automatic transmission car reaches a certain speed, releasing the accelerator will cause the speed to drop rapidly. If the accelerator is not pressed continuously, the vehicle will eventually stop. All vehicles rely on fuel to maintain normal operation. Speed without pressing the accelerator: For ordinary automatic transmission cars, there is an idle forward speed in the D gear position, which is approximately 5 kilometers per hour. Different models may have slight variations, and it is also related to tire pressure. Higher tire pressure may result in slightly faster speed, while lower tire pressure, due to better grip, may result in slightly slower speed. This refers to flat road conditions or in urban traffic. In situations like traffic jams where the car moves slowly, there is no need to press the accelerator, and the car can move forward slowly using the engine's idle traction.