The parking reservation solution Book-n-Park works with an "intelligent parking lot" that blocks a parking space until the driver activates the parking space via a web app on the smartphone. Parking spaces can be reserved with a smartphone or PC. The parking spaces are then released either via a special app or a link sent by e-mail. The smartphone, or the infotainment system for newer cars, then functions as a remote control at the blocked parking lot; the driver does not have to get off the car. Alternatively, a receptionist, secretary or hotline can release the parking lot via their computer at any time without having to be physically close to the parking spaces. No additional infrastructure such as transmitters, cameras, RFID readers, etc. installed on the vehicle is required!