Corporate parking doesn't fail all day. It fails for forty minutes, twice a day — and that's the only window worth designing for.
A campus car park with 2,000 bays and a 40% average occupancy sounds like a solved problem. It is not, because the average is meaningless. What matters is the forty minutes at shift change when several hundred vehicles attempt to enter or exit through two lanes.
Queue length is arithmetic, not opinion
Entry lane throughput is dwell time divided into the lane count. At twelve seconds per vehicle through a single ticketed lane you clear 300 vehicles an hour. If 500 arrive in that hour, the queue grows by 200 — and it grows onto the public road, which is where it becomes someone else's problem and then your problem.
Drop dwell to effectively zero with tag-based entry and the same lane clears well over a thousand. This is why access method, not lane count, is usually the cheaper fix. Adding a lane means civil work; changing the credential means a reader.
Separate the populations
Employees, visitors and vendors have different verification needs and should never share a lane at peak. Employees on tags need no stop at all. Visitors need verification, which takes time, and should be pre-registered so that verification happens before they arrive rather than at the barrier. Vendors and deliveries need dock scheduling more than they need parking.
- Employee lanes: RFID or FASTag, zero dwell, no stop.
- Visitor lane: QR issued at invitation, plate pre-registered, verification already done.
- Vendor lane: scheduled slots against the dock, not first-come.
Model before you build
Lane geometry and stacking distance are fixed once the civil work is done. Queue modelling against your actual arrival curve costs a fraction of a single lane and routinely shows that the expensive option was unnecessary — or that the cheap option would have failed in month one.
The arrival curve is site-specific and you already have the data: gate logs, biometric punch-ins, or even security register timings will give you the shape. Design for the peak forty minutes and the other twenty-three hours look after themselves.