A highly automated car-rental system based on a specially equipped fleet of cars for hire and one or more control stations. An authorized subscriber can enter any car of the fleet which is free for hire at any location, and use it for a desired period of time, parking it at the end of the hire period at any authorized parking place. Cars are equipped with customer, identification means, means enabling use of tile car or refusing such use, monitoring means for the main subsystems and other parameters of the car and means for conveying such information to central control. There is also provided a system for monitoring in real time car position, and if desired, for displaying such information also on a monitor in the car, thus informing control on tile position of the car at any instant of time.