If you drive on Indian national highways, you have probably heard that toll booths are going away and that satellites will soon decide what you pay. Two terms keep coming up: MLFF (Multi-Lane Free Flow) and GNSS (Global Navigation Satellite System) tolling. They are related but not the same thing, and the difference matters for what you actually need to do as a vehicle owner in 2026.
Here is the honest, current picture. India has started removing toll barriers, but the change is happening in phases over several years, and for the vast majority of private car owners, FASTag is still the thing that pays your toll today. This guide explains what is live now, what is coming, the 20 km free rule everyone asks about, and the simple steps to make sure you do not get an e-notice or a double charge.
MLFF vs GNSS: two different ideas people keep mixing up
MLFF (Multi-Lane Free Flow) means toll points with no boom barriers. You drive straight through at highway speed and the system charges you without you stopping. The technology doing the charging at these plazas right now is the same FASTag (RFID) you already have, backed up by ANPR (Automatic Number Plate Recognition) cameras that read your number plate.
GNSS (Global Navigation Satellite System) tolling is the next step: instead of charging you at fixed points, your vehicle's location is tracked by satellite systems such as GPS and India's own NavIC, and you are billed for the exact distance you travel on tolled highways. No plaza, no gantry interaction needed at all in the final form.
In short: MLFF is barrier-free tolling (live in 2026 at select plazas, using FASTag), and GNSS is satellite distance-based tolling (still rolling out, starting with commercial vehicles). Today's barrier-free plazas are MLFF-with-FASTag, not full GNSS.
- MLFF = no barrier, drive through, charged via FASTag + camera. Already live.
- GNSS = satellite tracks distance, you pay per km. Phased rollout, commercial vehicles first.
- Both are run by NHAI and IHMCL under the Ministry of Road Transport and Highways (MoRTH).
What is actually live in 2026
India switched on its first barrier-less MLFF toll system in May 2026 at the Chorayasi plaza on the Surat-Bharuch section of NH-48 in Gujarat. A second went live shortly after at the Mundka-Bakkarwala plaza on Delhi's UER-II. At these plazas the boom barriers are gone: your FASTag is read as you drive through, and if your tag is missing, invalid, or low on balance, ANPR cameras capture your number plate and an electronic notice (e-notice) is sent to the registered owner to pay.
NHAI has identified 17 fee plazas across nine states, including Tamil Nadu, to be upgraded to MLFF by September 2026, with 108-plus more plazas planned in a second phase by March 2027. The government's stated goal is a barrier-free national highway network by the end of 2026. So through 2026, expect a mix: some plazas barrier-free, most still with barriers, all still using your FASTag.
Do you still need FASTag? Yes, very much
This is the most important point for everyday car owners. MLFF is an evolution of FASTag, not a replacement for it. At the new barrier-free plazas, FASTag remains the primary payment method, and FASTag stays mandatory on national highways. A valid, recharged, KYC-updated FASTag is what lets you sail through without a notice or penalty.
If your FASTag is blacklisted, has low balance, or is unreadable when you cross, the system falls back to your number plate and issues a digital notice for the pending amount. At the launch plazas, you are typically given 72 hours to pay an e-notice; if you miss that window, the amount can be charged at up to twice the normal toll rate. Letting your tag lapse is exactly what causes problems in a barrier-free world, because there is no person at a booth to take cash and sort it out on the spot.
CareAll is an independent FASTag service partner (not SBI or NHAI). We help with new FASTag issue, recharge, KYC and blacklist fixes, usually within minutes on WhatsApp at 90420 10180, so your tag stays clean before you hit an MLFF plaza.
The 20 km free rule, explained correctly
A lot of headlines said "free travel up to 20 km." Here is what the rule actually says. Under MoRTH's National Highways Fee (Determination of Rates and Collection) Amendment Rules, 2024 (in force from 10 September 2024), private (non-commercial) vehicles fitted with a working GNSS on-board unit get up to 20 km of travel per day on national highways and expressways toll-free, in each direction. Beyond 20 km, you pay only for the distance you actually drive.
The catch is that this benefit is tied to GNSS distance tolling and a GNSS on-board unit, which is not yet fitted to ordinary private cars. So for most car owners in 2026, the 20 km free allowance is not active yet. It becomes real once GNSS distance-based tolling reaches private vehicles, expected from 2026-27 onward. Always confirm the current status with NHAI or your tag issuer before assuming you qualify.
- 20 km/day free applies to GNSS-equipped private vehicles, in each direction.
- National Permit commercial vehicles are excluded from the free allowance.
- Beyond 20 km, you are billed only for actual distance, not a flat plaza fee.
Who moves to GNSS first, and what is an OBU
GNSS tolling is rolling out in a sensible order. Commercial vehicles, trucks, buses and vehicles carrying hazardous goods already carry VLT (Vehicle Location Tracking) devices by law, so they are the first to move to satellite-based distance tolling. Private cars are expected to follow gradually from 2026-27 and beyond, with FASTag and GNSS running side by side during a hybrid transition period.
The device that makes GNSS work is an OBU (On-Board Unit): a small unit in the vehicle that reports your position to the tolling system. The government has not fixed a single public retail price for private-car OBUs yet, so treat any number you see as unconfirmed. For the actual cost and fitment process when it applies to your vehicle, check with NHAI/IHMCL or your issuing bank. Until then, FASTag does the job.
Practical tips so MLFF works for you, not against you
Barrier-free tolling is genuinely good news: less queuing, less fuel wasted idling, and lower emissions. NHAI expects the shift to save fuel and cut carbon by reducing stop-start traffic at plazas. But the convenience only works if your paperwork is in order, because the system now charges you automatically and chases you by notice if it cannot.
- Keep your FASTag active, recharged and KYC-complete. A blacklisted or low-balance tag is the most common cause of e-notices and double charges.
- Make sure your number plate is clean and clearly readable; ANPR is the fallback that bills you when FASTag fails.
- Frequent highway user with a private car? Consider the FASTag Annual Pass (priced at Rs 3,075 from 1 April 2026, valid one year or 200 toll-plaza crossings, whichever comes first) via the Rajmargyatra app or NHAI website. Confirm the current price and terms before buying, as fees are revised periodically.
- If you receive an e-notice, pay it within the stated window (72 hours at the launch plazas) to avoid being charged at twice the normal rate; verify amounts on the official NHAI/MoRTH e-notice portal.
- Selling or buying a vehicle? Transfer or close the FASTag so toll charges follow the right owner.