How Parking Garages Track Open Spaces, and Why They Often Get It Wrong

Why does a parking garage display a sign saying it's full when it's not, and vice versa?
Why does a parking garage display a sign saying it's full when it's not, and vice versa?

Car park entry system - what type do you need?

How do parking lots keep count of open spaces available and post on an electronic sign at the entrance? Are there sensors that connect to a computer? - Quora

Going Underground: Underground Parking Structures Can Offer Long-Term Benefits - WGI

Why Parking Garages Are Pointless — Streetsblog USA

How Parking Garages Track Open Spaces, and Why They Often Get It Wrong

For The Love Of All That Is Holy, Stop Backing Into Parking Spaces

Mapping the NYPD's Sidewalk Parking Habit - Bloomberg

Policies & Procedures - Parking and Transportation - George Mason University

Drivers spend an average of 17 hours a year searching for parking spots

Taking Up Two Parking Spaces Is Clearly Horrible, But May Not Be Illegal

Why Do Men Back into Parking Spots?