how do you make a driveable car
The closest thing is having a button that increases your speed and making a coordinate system so it detects when you"leave" the car, then activates a button that will allow you to increase your speed again. Or, you could have an item and an inventory item manager(?)/checker that increases your speed when you have it, then you can drop the item to “get out” of the car.
Also,
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Maybe have a button that hides the prop and changes your speed then switch to an item you get that you switch to that a checker constantly checks that changes your speed back to normal