Parking guidance systems for shopping malls: what to specify

Zone counting or bay-level guidance

Zone counting calculates free spaces per level from vehicles entering and leaving. It is simple and inexpensive, but it cannot tell a driver which aisle to take, and the counts drift unless they are corrected regularly.

Bay-level guidance detects each bay. It shows the exact number of free spaces on every level and in every aisle, lights each bay green or red, and is the basis for find-my-car. For a busy mall, bay level is the usual choice.

Ultrasonic or camera-based detection

There are two common ways to detect a bay:

• Ultrasonic sensors: one sensor above each bay, with an RGB LED indicator; simple, proven, and easy to maintain
• Camera-based sensors: one unit watches several bays and reads occupancy from the image; it can also read plates for find-my-car

The choice depends on ceiling height, the bay layout, the services already running through the ceiling, and whether find-my-car is wanted. Both can be specified by performance rather than by product.

A clear display hierarchy

Drivers should get the information they need at each decision point, and nothing more:

• At the entrance: free spaces per level, and FULL when a level is full
• At each ramp: free spaces on the next level
• In the aisles: counts with directional arrows
• At each bay: a green or red indicator, with distinct colors for accessible and reserved bays

Specify the number, size, and mounting position of displays on the drawings, so they can be read from a moving car.

Find-my-car

In large malls, visitors often cannot remember where they parked. Find-my-car lets them search by plate at a kiosk or on a phone and see the route to their car. It requires camera-based detection, or cameras added for that purpose. Agree with the operator how long plate data is kept and who can access it.

Integration with the parking management system

Guidance and parking management should share one set of numbers, so the count at the entrance matches the lanes and the operator sees occupancy and revenue in one place. If the mall keeps an existing management platform, integration depends on that platform, which is confirmed during the survey.

Cabling, power, and ceiling coordination

Sensors and displays go on ceilings already crowded with sprinklers, lighting, ductwork, and cable trays. Coordinating routes, controller locations, and power with the MEP services is where installations succeed or fail, and it is contractor work, not equipment supply.

Phasing in an operating mall

Guidance can be installed level by level or zone by zone, mostly at night, with temporary signage where a zone is out of service. Each zone is commissioned before the next starts: detection is checked against actual occupancy, and display counts are checked at every entrance and ramp.

What to put in the tender

• Bay counts per level, by type (standard, accessible, reserved)
• Detection method, or the performance the detection must achieve
• A display schedule with positions on the drawings
• Integration and reporting requirements
• Find-my-car: required or not
• Phasing constraints and working hours
• Commissioning and acceptance tests
• Maintenance, spare parts, and documentation at handover