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Parking Guidance Systems (PGS) are based primarily on the use of message signs to guide drivers to the nearest available vacant spot for parking. The system combined of:

• traffic monitoring, by use of ultrasonic sensors
• communication between controllers, which gather status of parking lot from the ultrasonic sensors
• processing of information by a computer
• variable-message sign to display number of vacancies at each parking level

The availability of parking spaces in each facility is obtained from ultrasonic sensors installed above the parking spot to detect if the spot is being occupied with car or not. When there’s no car detected, the Green LED indicator installed will light up, when there’s a car detected at the parking spot, the green LED will go off. As the picture below shows:

Parking Guidance Systems

Then the output from the ultrasonic sensor is being collected by additional controllers to be transmitted to a main computer for processing the information. Real time monitoring of the car park spaces can be seen on the screen of the main computer. At the same time, real time availability of car park spaces is being displayed on LED screen situated at appropriate places as below:

Parking Guidance Systems

Information on each car park level can be consolidated and displayed on a LED board placed at the entrance to the car park to guide drivers to the level with the vacant spaces.

Parking Guidance Systems

Benefits of PGS

• Reduction in time spent searching for parking.
• Reduced pollution, less cars circling around for vacant spot means less pollution emitted from the cars.
• Reduction in congestion due to fewer cars driving around searching for spaces.
• Reduction in illegally parked vehicles.
• Better distribution of flow and parking demand through the area.

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