[Infamous]

As mentioned above it's a case of getting the cars position within a timer. Reset the position of the car if no one is driving it and it has moved out of the vehicles spawn position.

pawn Код:

GetVehiclePos
GetVehicleZAngle
SetVehiclePos
SetVehicleZAngle

Use the above within the timer and it should be fairly simple. You will proberly want a timer that is repeating every 30 secconds or so.