Roadside · gantry-only RTCS

A toll zone should be a sensing and compute problem, not a pavement problem.

Tollscopic's roadside is gantry-mounted and roadside-cabinet contained. The hard tolling logic moves out of in-pavement infrastructure and out of proprietary lane-controller assumptions. Devices produce evidence; the system normalizes it.

01 · Toll zone · plan view

Per-lane equipment, zone-shared equipment, and one cabinet.

Per-lane equipment handles plate capture and classification context. Zone-shared equipment covers trajectory generation, transponder reads, edge compute, and WAN. Device choices are normalized through adapters — the schema below is the durable concept.

DIRECTION OF TRAVEL → L1 L2 L3 L4 OVERHEAD GANTRY ANPR L1 ANPR L2 ANPR L3 ANPR L4 RFID ANTENNA · zone-shared AVDC AVDC AVDC SIDEFIRE SIDEFIRE ORIN ×2 cabinet 01 02 03 04 05 → WAN · CELLULAR
01 ANPR cameras · per-lane

Plate capture per lane. Front and rear coverage where the zone supports it.

02 RFID · zone-shared

Transponder reads across the gantry. Independent of plate visibility.

03 AVDC / classification

Axle and class evidence via vision; LiDAR where configured. Sidefire + overhead options.

04 Sidefire CCTV

Vehicle trajectory generation. Continuous physical context through the zone.

05 Roadside cabinet · Jetson ×2

NVIDIA Jetson Orin in a redundant pair. Edge compute, local buffering, WAN.

02 · Evidence sources

Six categories. Each carries its own confidence and provenance.

No single device is the sole source of truth. The platform keeps multiple sources, knows where they came from, and exposes confidence so edge cases can be reviewed rather than hidden.

PLATE
Plate evidence

ANPR/ALPR cameras read visible plates. Confidence per character. Provenance and timestamps preserved.

VEHICLE
Vehicle path

Sidefire and wide-angle video produce a continuous trajectory through the zone.

AXLE
Axle / classification

Vision-based axle counts. LiDAR for vehicle dimensions. Vehicle-class cues.

TRANSPONDER
Transponder

RFID / AVI reads. Standard transponder events bound to the vehicle path that produced them.

LANE
Lane + position

Lane, time, and geometric position metadata for every observation.

MODEL
Model + provenance

Confidence values, model versions, prompt/config hashes, schema versions.

03 · Edge compute

Correlation starts close to the road.

Vehicle trajectories are generated at the roadside, where timing, geometry, and physical position still have operational meaning. The cloud receives evidence that is already bound to a vehicle path.

What the edge does
Vehicle detection and tracking
Sidefire video → vehicle trajectory
Evidence buffering
Local persistence during WAN degradation
Device-health monitoring
Image quality, frame rate, exposure, PTZ
Trajectory + evidence packaging
Bound records uploaded to the cloud
EDGE NODE · jetson-orin
hardware:    NVIDIA Jetson Orin × 2
power:       low draw, cabinet-friendly
network:     cellular-backed · local buffer
storage:     SSD · evidence cache
form:        fits standard roadside cabinet
runtime:     OTA updates · health checks
fallback:    hot-failover between Orins
04 · Hardware adaptability

Device outputs are normalized through adapters. The system is not a fixed SKU.

What matters to Tollscopic is the evidence schema. A device may change, but the system still wants the same conceptual outputs: what was observed, where, when, by which device, with what confidence, and how it relates to the trajectory.

Device output
Camera vendor A
Camera vendor B
RFID reader X
LiDAR Y
Axle sensor Z
ADAPTER
Normalized evidence
evidence.v1
{ source_type, source_id,
  observed_at, position,
  payload, confidence,
  device_meta, trajectory_id }
05 · Why gantry-only matters

The advantage is architectural, not magical.

Reducing dependence on pavement cuts and proprietary lane chains is what makes the system practical over a decade — not just at install time.

01
Fewer civil dependencies

No saw-cut, no in-pavement loops, no buried sensors. New devices, new lanes, or new geometries do not require returning to the road surface.

02
Easier modernization

Cameras and sensors evolve quickly. The roadside layer can absorb hardware change without forcing the transaction logic to change with it.

03
Simpler expansion

Adding a lane is a sensor and geometry update, not a civil project. The same evidence schema applies across zones.

04
Lower long-term cost

Pavement maintenance and in-road sensor failure stop being part of the cost model.

Bring the gantry. We bring the rest.

If you have a toll-zone footprint and a back office you do not want to replace, the gantry-only architecture is built for you.