- Why in news
- On 1 October 2026, NHAI rolled out Tamil Nadu's first barrierless Multi-Lane Free Flow (MLFF) tolling system at Paranur Toll Plaza on the Tambaram–Tindivanam section of NH-179B.
- What it is
- Multi-Lane Free Flow tolling lets vehicles pass a toll point at normal speed without stopping at a barrier. Cameras read number plates and the toll is charged to the linked FASTag. It is NHAI's phased upgrade of electronic toll collection on national highways.
- Technology
- The system combines Automatic Number Plate Recognition (ANPR) with FASTag-based electronic toll collection.
- Barrierless
- Vehicles pass through toll locations without stopping, which cuts human intervention and congestion.
- User obligation
- Users must keep a functional FASTag with enough balance, or they may get an Electronic Notice (E-Notice).
- Implementing agency
- NHAI is a statutory body under the Ministry of Road Transport and Highways, set up under the NHAI Act, 1988.
Don’t confuse with MLFF vs FASTag-based plaza tolling: FASTag alone still usually needs vehicles to slow at a plaza barrier. MLFF removes the barrier and adds ANPR cameras to identify vehicles and charge them.
Economy terms and data: 42 Prelims questions since 2013, rising in recent years; they test what a term or instrument means. In Mains, 12 news-triggered questions.
Why it matters
- Removes stops at toll plazas, saving time and fuel and cutting emissions and congestion.
- Reduces cash and manual handling, making toll collection more transparent and lowering the cost of building physical plazas.
Problems
- Revenue leakage from vehicles with no FASTag, low balance, or unreadable or non-standard number plates.
- Concerns over data privacy from continuous number plate capture, and over disputes with E-Notices.
Way forward
- Strengthen enforcement and recovery, linking unpaid tolls to vehicle records.
- Put in place clear data protection and grievance redress rules before wider rollout.
Put in your answer
Phased rollout: MLFF already works at several sites across Gujarat, Delhi-NCR, Rajasthan and Haryana before Tamil Nadu, showing a phased national rollout.
Ease of Living link: The government links the move to citizen-centric services using technology for Ease of Living and Ease of Doing Business.
UPSC’s own questions that come close to this issue, from our Prelims and Mains banks.
No practice question for this one; the card may still help an answer. Why: Lasting tolling technology (ANPR, FASTag); this release is a local rollout in Tamil Nadu, so a card only.
Worth revising until Prelims 2028: most news questions come within two years of the event.