A car with an automatic transmission will continue to move even when your foot is not on the gas. This can lead to an embarrassing or dangerous situation if you get out of your car while it’s still in D and drives away when you’re half in and half out.
A common example is when you’re stopping at the mailbox. You exit the car and have one foot on the ground and the other on the brake. When your foot comes off the brake, the car begins to drive forward. With one foot in the car and the other outside, it would be easy to fall and get run over by your own car.
Why is this still allowed to happen? A manual car doesn’t have this same risk. If it’s left in gear it will immediately stall out. And even if you leave an auto or manual in neutral and it starts to roll, it will be much easer to stop without power of the engine pushing it forward.
Technically, I understand why the transmission self-propels, but I don’t understand why they haven’t come up a way to prevent it. We live in such a litigious society, I would think the car makers would have been sued many times over this from people being hurt or killed by self-propelling cars.