There are two main types of parking guidance systems (PGS) present in the market: sensor-based and camera-based. The main difference between the two is in the way cars are detected. In a sensor-based system, ultrasonic sensors are used to detect the presence of the car. In a camera-based system, cameras are used to detect available and occupied spaces. The sensor-based system preceded the camera-based system in the market, but the latter is spreading in new markets each day.
Safety and Security
In addition to guidance, a camera-based system provides video footage of cars circulating the parking spots. This footage is extremely important since it detects incidents like stealing, vandalism, and accidents. This consequently gives customers a sense of safety and security.
Contrary to the camera-based system, the sensor-based system provides single-space guidance. This means that there is a sensor for each parking space showing the exact location of the car. The camera-based system provides signage for multiple spaces (3, 4, or 6) in a zone-like distribution.
Car Search Feature
Being able to detect the license plate numbers enables the camera-based PGS to know the exact location of cars in real time. This provides convenience to customers if they forget where they parked their car, which happens very often.
Installation and Cost
A camera-based system is easier to install since it comprises less devices. One camera can detect up to 6 parking spaces; whereas one sensor is needed for each parking space in the sensor-based system. However, this reduction of installation costs can be compromised by the additional price of the camera-based devices.