How Criminals Are Tricking Automatic Parking Gate Sensors
An individual walks up to a gated vehicle entrance carrying what appears to be a metal plate attached to a string. He lowers the plate to the ground, slides it underneath the gate, and begins moving it across the pavement.
Why?
He appears to be trying to trick the gate into thinking a vehicle is present.
Deep Sentinel Live Guards recently captured this behavior at a monitored property. And it’s a tactic property owners and managers should be aware of—especially at gated parking garages and apartment communities.
The Trick: Using Metal to Fool a Vehicle Detection Loop
Many automatic parking gates use something called an inductive loop, or vehicle detection loop.
These systems typically consist of wire installed beneath the pavement. When a vehicle passes over or stops above the loop, the metal in the vehicle changes the loop’s electrical characteristics. The detector recognizes that change as the presence of a vehicle and can send a signal to the gate or access-control system. Inductive loops are commonly used at parking structures, traffic signals, drive-throughs, and gated entrances.
That’s what makes the behavior in this video interesting.
Rather than arriving in a vehicle or attempting to physically force the gate open, the individual appears to be using a metal plate to imitate the presence of a vehicle. By positioning and moving a sufficiently detectable metal object over the area of the vehicle loop, the apparent goal is to trigger the detector and get the gate to respond.
Whether this technique works depends on the gate’s configuration, loop sensitivity, and the size and properties of the metal object. Vehicle-loop detectors are specifically designed not to respond to every small piece of metal, although their sensitivity can vary.
In other words, this isn’t someone simply trying to break a gate. They’re attempting to manipulate the technology that’s supposed to control access.
A Gate Is a Barrier, Not a Complete Security System
Parking gates serve an important purpose. They help control vehicle access and create a physical barrier between private property and the public.
But they aren’t necessarily designed to determine who someone is, why they’re there, or whether their behavior is suspicious.
That’s an important distinction.
A gate may restrict access. A security camera may record what happens. But neither necessarily provides someone who can recognize suspicious behavior and respond while it’s happening. This is particularly important for apartment communities, parking garages, commercial properties, and other locations where vehicles may sit unattended for extended periods.
What Happens Once Someone Gets Inside?
Unauthorized access to a gated parking area can create opportunities for other crimes, including:
- Vehicle break-ins and theft
- Catalytic converter theft
- Vandalism
- Theft of property from vehicles
- Trespassing
- Attempts to access other areas of the property
A gate can make these areas more difficult to enter, but property owners shouldn’t assume that gated automatically means secure.
Security works best when multiple layers work together.
Watch for the Behavior, Not Just the Alarm
This incident also illustrates an important difference between reactive and proactive security.
Traditional security systems are often designed around a specific event: a door opens, an alarm trips, glass breaks, or another sensor is activated.
But suspicious behavior can begin well before any of those things happen. Someone repeatedly approaching a restricted entrance, examining a gate, manipulating equipment, or attempting to defeat an access-control system can provide warning signs before a larger incident occurs.
That’s where remote video monitoring can add another layer of protection.
Deep Sentinel combines AI-powered video surveillance with trained Live Guards who monitor security events and can intervene when suspicious activity is identified. Instead of simply having footage of what happened afterward, the goal is to identify concerning behavior while it’s happening.
