Rassa Infra Tech & AI Solutions
Tolling System Architecture

Field devices to national clearing — end to end.

A layered MLFF architecture connecting roadside detection, regional operations, command centers, clearing, settlement and analytics.

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Tolling system architecture cover
Detection layer

Field devices capture every vehicle, every transaction.

Each sensor has a distinct purpose: classification, speed, identity, transponder read and enforcement evidence.

LiDAR

Vehicle classification, length profiling, height and point-cloud geometry.

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4D Radar

Speed detection, gap measurement, target tracking and lane continuity.

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ANPR

Automatic number plate reading for identity and enforcement workflows.

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RFID

On-board unit or FASTag transponder reads and account linkage.

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Field devices: LiDAR, radar, ANPR, RFID and CCTV
Three-tier architecture

Field, regional and national responsibilities.

Raw detection starts at the roadside. Regional centers process transactions and incidents. National systems aggregate clearing, settlement and analytics.

Field DevicesLiDAR, radar, ANPR, RFID and CCTV capture vehicle events.
Regional CenterOperations, incident management, transaction processing and VMS.
National CenterClearing, settlement, interoperability and network analytics.
Three-tier tolling architecture diagram
Regional center operations dashboard
Tier 2

Regional centers keep the corridor moving.

The regional layer manages real-time lane status, transaction processing, equipment health, event detection, crew dispatch and dynamic message signs.

Operations

Lane status, transaction processing and equipment health monitoring.

Incident Management

Detection, classification, crew dispatch and escalation protocols.

VMS

Dynamic sign control for tolls, alerts, diversions and safety messages.

Field Maintenance

Fault visibility and coordinated maintenance dispatch.

Tier 3

National centers protect clearing, settlement and analytics.

The national layer is responsible for interoperability matching, financial reconciliation, invoicing, payment processing, KPIs and predictive modeling.

Clearing

Interoperability matching across operators and schemes.

Settlement

Financial reconciliation, invoicing and payment processing.

Analytics

Network-wide reporting, KPIs and predictive modeling.

Compliance

Regulatory data products and audit-ready reports.

National center architecture and ANPR/LiDAR data center
Data flow from field devices to regional and national centers
Bidirectional communication

Data flows up. Commands flow down.

Upward communication moves from detection events to transaction records and aggregated financials. Downward communication carries tariff tables, device firmware updates and VMS messaging.

UpwardDetection events → transaction records → aggregated financials.
DownwardTariff tables → firmware updates → VMS and field commands.
Detection comparison

Each sensor contributes a different evidence layer.

LiDAR and radar provide lane-accurate classification, speed and geometry. ANPR and RFID provide identity capture. CCTV supplies timestamped enforcement evidence for dispute resolution.

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Detection technology comparison
Scalability considerations across edge, regional and national layers
Scalability

Built to remain operational when one layer degrades.

Field devices operate independently during regional communication failure. Hot-standby regional centers prevent transaction gaps. Distributed national clearing nodes protect settlement integrity.