Multi Lane Free Flow Tolling
Advanced vehicle detection and classification solutions for barrier-free highway tolling
Complete Sensor Technology for MLFF Toll Collection
As NHAI deploys Multi-Lane Free Flow (MLFF) tolling across India’s National Highways, RST provides the advanced sensor technology essential for seamless vehicle detection and classification.
Rocket Science Technologies’ MLFF-ready solutions integrate 4D radar, 3D LiDAR, ANPR cameras, and IR illumination to enable accurate toll collection at highway speeds.
Plazas in Rollout
Operation
Accuracy
Rating
Supporting India's Barrier-Free Toll Collection Initiative
NHAI is transforming highway toll collection with Multi-Lane Free Flow technology, starting with India’s first barrier-free toll plazas at Choryasi (Gujarat) and Gharaunda (Haryana).
The program aims to deploy MLFF systems across 25+ locations in FY 2025-26, eliminating physical toll barriers while maintaining accurate vehicle detection and revenue collection.
Rocket Science Technologies partners with infrastructure operators to deliver the full sensor solution stack required by modern MLFF deployments.
Key MLFF Requirements:
- High-speed vehicle detection and classification
- Multi-lane simultaneous monitoring
- FASTag RFID integration
- Front and rear ANPR for VRN capture
- 24×7 all-weather operation
- 99%+ transaction accuracy
Key MLFF Requirements:
- High-speed vehicle detection and classification
- Multi-lane simultaneous monitoring
- FASTag RFID integration
- Front and rear ANPR for VRN capture
- 24×7 all-weather operation
- 99%+ transaction accuracy
Five Integrated Technologies
A complete ecosystem for barrier-free tolling.
4D Speed Radar
- Tracks 256 vehicles across 8 lanes
- NATRAX-certified 99.04% accuracy
- Long-range 300m+ detection
3D LiDAR
- Full 360° scanning (4 lanes)
- Detailed profile & axle count
- Robust IP67 housing
2D LiDAR
- 180° scanning & vehicle counting
- 50Hz/100Hz high-frequency
- Effective in rain, fog, or dust
ANPR Systems
- High-speed OCR (120km/h+)
- Dual-camera verification (Front/Rear)
- NETC/FASTag integration ready
IR Illumination
- 850nm invisible wavelength
- 24x7 license plate clarity
- Low power solar-compatible
Selecting the Right Sensors
Compare technical specifications to find the best fit for your deployment.
| Parameter | 4D Radar (RS4D080) | 3D LiDAR (Agnibaan Ultra) | 2D LiDAR (Agnibaan) |
|---|---|---|---|
| Lane Coverage | 8 bi-directional | 4 lanes | 1-2 lanes |
| Detection Range | 300m+ | 200m | 40m |
| Primary Function | Tracking, speed | Classification, AVC | Traffic count, detection |
| Accuracy | 99.04% (NATRAX) | 99% classification | ≥ 98% count |
| Weather Impact | None | Minimal | Minimal |
| Night Operation | Excellent | Excellent | Excellent |
| Best For | Multi-lane MLFF | Premium classification | Standard detection |
How Sensors Integrate With Your Rollout
Our ecosystem ensures seamless integration with existing systems.
Detection Layer
- 4D Radar: Multi-lane vehicle tracking
- 3D LiDAR: Vehicle classification
- ANPR Cameras: Front/rear VRN capture
- IR Illuminators: Consistent lighting
Processing Layer
- Sensor data fusion and AI-based classification
- Transaction logic with FASTag match
- Real-time validation and audit trail
Integration Layer
- Existing FASTag RFID + NPCI/NETC systems
- TMC integration and monitoring tools
How Sensors Integrate With Your Rollout
Our ecosystem ensures seamless integration with existing systems.
Operational Excellence
- Certified detection accuracy
- 24×7 all-weather, low-maintenance
- Redundant sensor architecture
Technical Advantages
- Multi-lane, high-speed classification
- Accurate axle count, vehicle type
- Scalable and retrofit-compatible
Infrastructure Benefits
- FASTag infrastructure-ready
- Solar-compatible deployments
- Weatherproof, long-life devices
Related Products
Best-in-Class Sensors for Seamless MLFF Integration
4D Speed Radar
NATRAX-certified 4D radar for MLFF-ready detection. Tracks 256 objects across 8 bi-directional lanes with 250+ km/h speed and 300m range for accurate, high-speed vehicle tracking and toll enforcement.
3D LiDAR
High-performance LiDAR for smart highways, monitoring up to 4 lanes with exceptional range and 99%+ classification accuracy. Ideal for MLFF, automatic vehicle classification, and dimension detection.
2D LiDAR
180° scanning LiDAR with 40m range, delivering ≥ 98% count and ≥ 99% classification accuracy. IP68-rated for all-weather use; fast scanning for real-time, multi-lane tolling and traffic data collection.
Frequently Asked Questions
Everything You Need to Know About Multi-Lane Free Flow Tolling
What is MLFF and why is it important?
MLFF (Multi-Lane Free Flow) tolling allows vehicles to cross toll points without stopping, improving speed, emissions, and safety, while supporting revenue integrity.
What sensors are required for MLFF?
4D Radar, 3D LiDAR, 2D LiDAR, ANPR cameras, and IR illuminators collectively deliver vehicle detection, classification, and VRN identity according to NHAI requirements.
Can these sensors be retrofitted in existing plazas?
Yes; the modular design supports deployment on new or brownfield sites.
How do these sensors integrate with FASTag systems?
RST sensors work with existing RFID and NETC infrastructure to enhance detection and ensure transaction accuracy.
What accuracy is possible with these systems?
RS4D080 achieves NATRAX-certified 99.04% accuracy; Agnibaan Ultra delivers 99% classification.
Are these sensors reliable in rain or fog?
Yes; all sensors have high weatherproof ratings, and radar/LiDAR operate in poor conditions.
Can all vehicle types be detected?
Yes, the integrated suite supports motorcycles, cars, buses, trucks, HCVs, and MAVs.
How does MLFF handle non-FASTag vehicles?
ANPR captures VRNs, enabling post-billing and enforcement.
Are these suitable for solar installations?
Yes; power-efficient designs support solar-powered toll plazas.
Deploy MLFF Technology for Your Toll Plaza
RST provides complete detection technology for Multi-Lane Free Flow toll collection.