Tips to design your own Parking Guidance System project

Tips to design your own Parking Guidance System project

Parking Guidance Systems (PGS) have been proven to cut the customer's time-to-park in half and results in a 3‐5% rise in visits. The easier it is for customers to visit, the more frequently customers will return.

More and more car park operators realize the importance of installing a PGS in their car park, so when a client asks your advice, how do you design a parking guidance solution that most suits their requirements? Here are some tips that can help. 

Suppose the project has 1200 parking spaces, 3 levels.

First, we need to know the PGS diagram:

PGS Keytop

We know that a parking guidance system mainly consists of:

  • CCU: Central Control Unit (With Software)
  • ZCU: Zone Control Unit
  • UD: Forward Mounting Ultrasonic Detector
  • LED screen: Outdoor/Indoor LED screen

The next step is to decide how many of the above apparatus are required for this project.

CCU: The main function of CCU is to establish the relevant ZCU data by turns, it processes this data and then sends the processed data to the server or other relevant equipment. CCU has built in management software, usually, a project needs one CCU.
PGS Keptop

ZCU: The main function of the ZCU is to establish the relevant sensors’ status via RS485-B by turns, and forwards the data (refer to Connection explanation) to CCU by RS485. Meanwhile, the ZCU forwards the command of CCU to LED screen via RS485-B. Theoretically, one ZCU can support 60 sensors, there are 1,200 parking space in this project, so 20 ZCU's will be required.

PGS Keytop

UD (Utrasonic Detector): These are installed at the front of each parking space detecting the occupancy in order to relay this message to the ZCU. The built-in led indicator will change from green to red when the parking space is occupied. One parking space needs one UD, so 1200 sensors are required.

PGS Keytop

LED indoor display: LED indoor display will be installed at the crossings or the entrance to display real time parking information to the drivers.

PGS Keytop

The arrow will show the direction to the drivers and the three digits will tell the drivers how many parking spaces are available. 

A professional engineer will design the indoor led display quantity accordingly to the car park layout. There is a simple way to work out an estimated led display quantity:

Parking Space Qty ÷ 40= indoor display QTY.

So in this project approximately 1200÷40=30 pieces of indoor displays are required.

LED outdoor display: The LED outdoor display will be installed at the outdoor entrance to show information about the whole car park to the drivers. There is one entrance in this project, so one outdoor display (with 3 led panels) is required.

PGS Keytop

Above is a simple way to help you design a PGS solution for your client. Any questions? Please feel free to contact me via email at

About Keytop Parking Inc.Keytop logo

As the largest parking guidance systems supplier in China, Keytop, set up in 2006, commit ourselves to providing the complete intelligent parking solutions including: parking guidance systems (wired/wireless/indoor/outdoor), vehicle tracking systems (car finding), non-card parking payment systems and more. Our well-equipped facilities and excellent quality control throughout all stages of production enable us to guarantee total customer satisfaction and have therefore attained certifications, CE and ISO9001:2008. Tallied in 2014, there are more than 600,000 parking spaces in over 1000 car parks in 50 countries with our parking solutions, breaking all the records in the parking guidance industry.

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