Forward road video paired with a GNSS+IMU pose stream — position, velocity, bearing, three-axis acceleration and rate, and a full 3×3 rotation matrix per timestep. Every record carries both a wall clock and a monotonic clock, so the telemetry stays aligned to the video across NTP corrections, and the whole delivery is built to the NVIDIA Cosmos Data Card schema.
| Road | |
|---|---|
| Resolution | 1280 × 720 |
| Frame rate | 30 fps |
| Codec | HEVC (H.265) |
| Video bitrate | ~2.0 Mbps |
| Audio | none |
| Segment length | 120 s |
| File size | ~30 MB |
| Per device-hour | ~918 MB |
MP4 container — 3,600 frames per road segment.
Faces in the road footage are detected and blurred before delivery. The blur is burned into the delivered frames — not a viewer-side overlay, and not reversible by whoever receives the data. Device and driver identifiers are replaced with synthetic ones, so a delivered segment carries no route back to a vehicle or a person.
Position, velocity, attitude — one sidecar per video segment, same time window. The IMU is sampled at 100 Hz and the solution decimated to 10 Hz for delivery; the full 100 Hz stream is available on request.
Three event types leave the vehicle without anyone asking, carrying the same imagery and ego-state as everything else. They upload over the unit's own LTE connection while the vehicle is still on the road — no dock, no card to collect, no return to base. Out of coverage, the event is held on the device and re-driven when the connection comes back, so nothing is lost to a dead zone.
| Event | What triggers it | What arrives |
|---|---|---|
| Accident | Impact detected in the inertial stream, above a threshold set to clear ordinary braking | Road video either side of the moment, the inertial trace at full 100 Hz through the impact, and a structured event report — the long tail nobody can stage on a test track |
| VRU encounters | A hard brake, swerve or sharp acceleration, or a rare actor seen in frame | A five-second clip centred on the moment, tagged with what else was in the scene — real conflict with pedestrians and cyclists, driver reaction attached |
| Toll crossings | Entering or leaving a known gantry or landmark, by position — every pass, not a sample | A clip and ego-state track per crossing. The same surveyed, never-moving structure traversed hundreds of times across vehicles, lanes, light and weather — a standing reference for localisation and map validation, where the ground truth is the geometry itself |
Verbatim, unedited:
{ "type":"gnss_imu", "ts":1788481158892, "monoNs":1847746744501,
"lat":37.3319364, "lon":-122.0553775, "alt":56.7,
"spd":30.782, "brg":140.666, "acc":3.79,
"gps":true, "dr_age_s":0.4, // GPS-anchored, 0.4 s since last fix
"ax":11.7244, "ay":-0.972, "az":-1.0008, // m/s², device frame
"gx":-0.02142, "gy":0.10156, "gz":-0.0318, // rad/s
"R":[-0.036876,0.281996,0.958733, 0.030165,-0.958635,0.283037,
0.998864,0.039140,0.026805] } // device → navigation, row-major