Busy is normal. That’s the problem.
A logistics hub is designed for traffic. Tractors pull in at the gate, drop trailers in the yard, back into dock doors, hook up and pull out again. Yard jockeys shuttle trailers all shift. Drivers walk to the guard shack, the restroom and back. Every camera on the site shows legitimate vehicle and people activity for most of the day and much of the night.
Any alarm that fires on vehicles or motion alone fires constantly here. Operators learn to mute it. That is how a cargo thief hooking up to the wrong trailer, a person cutting through the fence line at the back of the drop lot, or a car parked beside a dock door at 2 a.m. gets through. Semaphor is AI video monitoring assistance designed for exactly this kind of screen.
Where the cameras point.
| Area | What guards watch | What should get their attention |
|---|---|---|
| Inbound and outbound gates | Trucks checking in and out, driver paperwork, gate arms | A vehicle entering without stopping, a person on foot entering beside a truck |
| Trailer drop yard | Rows of parked trailers, yard tractor moves | A tractor or pickup at a trailer outside shift moves, a person between trailers after hours |
| Dock doors | Loading and unloading, dock plates, staging lanes | A person at a closed dock door overnight, a vehicle backed in with no scheduled load |
| Perimeter and fence line | Long fence runs, often poorly lit | Anyone on foot near the fence, especially at the far end of the yard |
| Employee and driver parking | Shift change traffic | Someone moving between cars during the middle of a shift |
Why duplicate suppression matters more here than anywhere.
A yard camera can have the same forty trailers and a dozen tractors in view all night. A dock camera shows the same parked tractor in front of door 12 for hours. A naive detector will tell the guard about each of them, again and again, every time a light flickers or the camera auto-adjusts.
Semaphor’s duplicate alert suppression uses event routing with cooldowns and object tracking so a vehicle that has been sitting in place stops producing new cards. What reaches the inbox is new activity: something arriving, something moving where it wasn’t, a person where people aren’t expected. Pair that with the nuisance alert playbook to tune your post orders around real risk.
Typical camera and layout problems at hubs.
- Huge, deep yard views. A person at the far end of a trailer row is a few pixels tall. Once a person is detected, tracking and regional rechecks keep them supported across frames, even when they stop moving.
- Headlight glare. Trucks swinging into the gate at night blast light across the lens.
- Occlusion. Trailers hide people. Someone walks behind a trailer and reappears seconds later; Semaphor’s tracking recovers them through short gaps instead of treating them as a new event.
- Too many cameras for the gate guard. The person checking in drivers is also supposed to watch the yard wall. They can’t do both at once.
- Mixed systems. Newer dock cameras and older yard cameras on different recorders, shown on one dashboard.
What your guards watch
- Gate lanes full of trucks, drivers and paperwork
- Yard cameras over hundreds of parked trailers
- Dock doors that are busy by day and still by night
- A fence line nobody has looked at in an hour
What Semaphor surfaces
- A person on foot between trailer rows after the last yard move
- New vehicle activity at a trailer, not every parked tractor again
- A person near the fence, with a scene report and recommendation
- Original frames and hashes ready for a cargo theft claim
How Semaphor runs at a logistics hub.
Semaphor captures the monitoring screen at the gate house, the site security office or a remote SOC. It splits the grid into camera panes, fingerprints each view and follows it as layouts rotate. No VMS change, no camera credentials and no integration with the yard management system.
Local detection finds people and vehicles on every pane. When something new happens, an alert card lands immediately, then an AI scene report updates it with what the model sees and whether guard review is suggested. The guard inbox sorts cards by priority and keeps the guard in control of every acknowledgment and every dispatch.
For multi-site operators, a GSOC can run Semaphor on the operator stations that already display each facility’s cameras. Evidence from every alert carries the original frame, an exact SHA-256 hash and an exportable manifest for claims and investigations.
Put it on your yard cameras.
Book a live demo on your own camera screens, or start a pilot at one gate house. We measure missed events and nuisance alerts on your real yard traffic.
Drivers overnighting nearby? See monitoring gas stations and truck stops.
Logistics surveillance FAQ
Will every truck through the gate create an alert?
Not as a flood. Cooldowns and duplicate suppression hold back repeats, and the AI review describes routine gate traffic so the guard can clear it at a glance.
Does Semaphor read license plates or trailer numbers?
Not today. It detects people and vehicles and describes the scene. Reading on-screen camera labels is in active development.
Can it watch sites that have no on-site guard at night?
Yes, when those cameras are displayed on a remote monitoring station. Semaphor runs where the screen is.