How long is the whole STRR?

The plan covers about 280.8 km of controlled-access highway, numbered NH 948A and NH 648 and built by the NHAI. Twelve towns are linked, and part of the alignment crosses into Tamil Nadu close to Hosur.

Where can I drive on the ring right now?

Only on the 80 km northern arc from Dobbaspet to Hoskote, bypass at Doddaballapura included. Toll applies, and the inauguration took place on 11 March 2024.

Why has the Hoskote link towards Tamil Nadu not opened?

One rail overbridge is incomplete at Lingadeeramallasandra, where the road crosses the Chennai line out of Bengaluru. Girder launch drawings were cleared by South Western Railway in June 2026, and the railways' standards body must test speeds before the launch.

Are the STRR and the Peripheral Ring Road one and the same?

They are different projects. The STRR is an NHAI highway for satellite towns far from the city, whereas the Bengaluru Business Corridor, formerly the Peripheral Ring Road, is a state scheme closer in.

Which towns does the ring serve?

Anekal, Attibele, Devanahalli, Dobbaspet, Doddaballapura, Hoskote, Kanakapura, Magadi, Ramanagara, Sarjapura, Sulibele and Tattekere. A short portion near Hosur is in Tamil Nadu.

STRR Bangalore: Open Stretches, Delays and Buyer Tips

Plot ads around Bangalore's outer towns often lean on one road, the Satellite Town Ring Road (STRR). Before paying for that promise, it helps to know which stretches carry vehicles in October 2026 and which exist only on paper. This guide follows the ring from its working end to its unbuilt end, then turns to what buyers should verify.

What kind of road it is

NHAI is building the STRR under Bharatmala as a controlled-access highway of roughly 280.8 km. The new alignment is numbered NH 948A, and the northern and eastern portion rides on the realigned NH 648, formerly NH 207. Expect four or six lanes, and the road is designed for 100 km/h.

Its job is to take trucks and long-haul traffic around the city instead of through it. On the way it crosses Hosur Road, Old Madras Road, Bellary Road and Tumkur Road. Twelve towns are tied together, and a short run near Hosur dips into Tamil Nadu before coming back to Karnataka.

Do not mix it up with the Bengaluru Business Corridor, earlier called the Peripheral Ring Road. That is a state scheme running close to the city, while the STRR stays far outside it.

The working end: Dobbaspet to Hoskote

Drivers can use 80 km of the ring today. It starts on Tumkur Road near Dobbaspet, skirts Doddaballapura, brushes Devanahalli and ends at Old Madras Road beside Hoskote. The inauguration was on 11 March 2024.

Two packages made up this arc. The first runs 42 km to the Doddaballapura bypass with four lanes and has charged toll since June 2024. The second adds 38 km of six-lane road to Hoskote, tolled since November 2023.

The nearly finished link south of Hoskote

The 20.9 km piece heading towards the Tamil Nadu border was meant to open in February 2025, and several later dates have passed. Most of the tarmac is done. What is missing is about 0.65 km at Lingadeeramallasandra, where a rail overbridge must span the Chennai line out of Bengaluru.

That bridge needs two bowstring girders, each 54 m long. South Western Railway cleared the girder drawing in June 2026. Ahead of the launch, RDSO (the Research Designs and Standards Organisation) has to test the span at speed. Because the opening hangs on that step, ask NHAI for the latest position before relying on this stretch near Hoskote.

The parts still on paper

Beyond the Hoskote link the picture thins out:

Tamil Nadu portion: about 36 km up to Belagondapalli, close to Hosur, where a contractor is appointed
From Hosur towards Ramanagara beside Bannerghatta National Park: about 65 km at tender stage, waiting for environmental clearance, with an 8.1 km elevated road in the plan
Ramanagara onward through Magadi to the Dobbaspet side: about 79 km, again at tender stage

In September 2024 NHAI invited bids for five packages that cover about 144 km of the western and Bannerghatta parts. The estimate was Rs. 4,750 crore. Opening dates are yet to be announced for these parts.

Which towns benefit, and when

A ring this far out helps freight and travel between regions more than the daily run into the city. Benefits therefore arrive unevenly:

Hoskote: three roads converge here, namely the STRR, Old Madras Road and the Chennai expressway, which suits warehousing and industry
Doddaballapura and Devanahalli: the open arc is a signal-free connector between Tumkur Road, Old Madras Road and the airport belt
Sarjapura, Attibele and Anekal: gains begin once both the Hoskote link and the Tamil Nadu portion are opened
Kanakapura, Ramanagara, Magadi, Tattekere and Sulibele: the benefit waits for tenders that are yet to become construction

Office-goers heading to Whitefield or the Outer Ring Road should not expect a faster drive. The value is in freight, factory jobs and trips between satellite towns, and housing demand follows those jobs over the years.

Verify before you buy

Many plots near the ring are marketed with the road as the main attraction. These steps help to sort fact from sales talk:

Identify the stretch nearest the land and note its stage above.
Time the drive to the closest interchange, since entry is allowed only at such points.
Get the RERA registration, the layout approval from the planning authority and the order converting the land.
Check the khata and the title documents, which no highway can correct.
Put the toll into the running cost of each regular journey.
Compare the asking price with approved layouts away from the alignment.
Base the value on roads that work today, and count unbuilt stretches as a bonus.

Up north, the buyer pays for tarmac that exists. East of Hoskote the work left is modest, yet deadlines have already been missed once. Across the south and west only a plan exists, so a price built on a finished ring leaves the buyer to bear the delay.