When a car crosses a tolled bridge or tunnel, our device records proof from the road camera at the entry and the exit, and uploads it with a crossing record. Below is a real crossing and how it works.
Approach on the upper level, with the GWB tower ahead.
Passing the New York tower under the large US flag, then onto the span.
Clips are 12 s at 256×144, the landmark clip resolution set over the air.
A confirmed crossing produces 5 files: one crossing record and two 12-second road clips, each with a small sidecar file. The two videos are the billing proof. The sidecars carry time, place and geometry.
| Files | Camera | What it is |
|---|---|---|
1 · .json | — | Crossing record: facility, direction, toll amount, time, GPS, geometry |
2–3 · .mp4 + .json | Road | 12 s around the ENTRY |
4–5 · .mp4 + .json | Road | 12 s around the EXIT |
{
"landmark_id": "PA_GWB",
"facility": "George Washington Bridge",
"direction": "forward",
"direction_label": "New Jersey -> New York",
"tolled": true,
"toll_amount_usd_ezpass_car": 16.79,
"crossing_time_ms": 1791822763652,
"method": "corridor",
"speed_mps": 12.73
}
The device recognises a toll crossing on its own and builds billing-ready proof automatically, with no one searching through footage.
Each bridge and tunnel is stored with its exact location, road direction and toll amount. The file updates over the air.
GPS positions stream in throughout the trip, each with a satellite timestamp that cannot be changed on the device.
When the car's positions pass through a toll point in the right direction, the crossing is confirmed and the entry and exit clips are saved as proof.
Need other bridges, tunnels or toll roads? Tell us which.
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