Bengaluru–Chennai Bullet Train Project Moves to Next Planning Stage With Route Finalisation

The long-discussed Bengaluru-Chennai high-speed rail corridor (bullet train) is beginning to take clearer shape, with planners moving beyond basic surveys to focus on where stations will come up, how much of the line will run underground and what the next steps in execution could look like. If you are frustrated with the long trek between these two cities, here's some good news: the new line is supposed to slash travel time, making it a big piece of India's growing high-speed rail ambitions.

According to a report by Moneycontrol, alignment surveys for the 306-km corridor have already been completed. Once operational, the line is expected to cut travel time between Bengaluru and Chennai to around 1 hour and 13 minutes, a sharp reduction from current rail and road journeys. In Bengaluru, planners are considering two underground stations, at Byappanahalli and Whitefield, to better connect the new corridor with existing transport networks and limit disruption in densely built-up areas.

The project is part of a wider national push announced in the Union Budget 2026-27, in which Finance Minister Nirmala Sitharaman outlined seven high-speed rail corridors spanning nearly 4,000 km. While the Bengaluru-Chennai and Bengaluru-Hyderabad routes have been taken up in the first phase, the Bengaluru-Mysuru stretch is expected to come later.

Officials at the National High Speed Rail Corporation Limited (NHSRCL) say the final alignment survey for the Chennai-Bengaluru section has been wrapped up and that the route is likely to be frozen soon. The corridor will pass through Tamil Nadu, Andhra Pradesh and Karnataka, linking major cities as well as several emerging regional centres along the way.

Stations proposed on the corridor include Chennai Central, Poonamallee and Parandur in Tamil Nadu; Ramapuram near Chittoor in Andhra Pradesh; and Hudukula near Kolar, Kodihalli near Hoskote, Whitefield and Byappanahalli in Karnataka. Planners say the idea has been to spread access across districts rather than limit the line to large city terminals alone.

Some of the station choices are aimed at widening the catchment. The Chittoor station near Ramapuram is expected to serve not just the town but also the Katpadi-Vellore belt, while the Kolar station at Hudukula has been planned to cover both Kolar and Bangarpet.

On the technical side, the line is being designed for a maximum speed of 350 kmph, with trains expected to operate at around 320 kmph. Average running speeds are projected at roughly 250 kmph, which would allow the end-to-end journey to be completed in just over an hour.

Before settling on the present alignment, planners examined multiple route options, weighing factors such as terrain, distance, land availability and construction challenges.

While most of the corridor will run on elevated tracks, several tunnel and underground sections have been planned to deal with urban congestion and difficult terrain. These include a 2.5-km tunnel within Chennai city, an 11.5-km tunnel through the Mogili ghat section near Chittoor, and an underground stretch of nearly 12 km within Bengaluru, between Whitefield and Byappanahalli. In the city, officials say underground construction will help reduce land acquisition and surface disruption, even though it adds to engineering complexity.

Maintenance depots are proposed at Poonamallee near Chennai and Kodihalli near Hoskote. Some preparatory work has already moved ahead, with contracts awarded for LiDAR surveys, utilities mapping and preparation of general arrangement drawings, indicating a shift from preliminary studies to detailed design.

The project is being implemented by the National High Speed Rail Corporation Limited, a special-purpose vehicle under the Ministry of Railways. While the corridor is being developed as a central project, state governments will have a role in facilitating land acquisition and statutory clearances.

The funding structure, however, is yet to be finalised. Officials say various options, including central funding, multilateral loans and public-private partnership models, are under consideration.

Railway officials have also clarified that Mysuru has not been dropped from the high-speed rail plan and is expected to be taken up in Phase II. They point out that improved road connectivity between Bengaluru and Mysuru has eased immediate pressure on rail travel along that corridor.

Union Railway Minister Ashwini Vaishnaw has said the seven proposed high-speed rail corridors could together attract investments of around ₹16 lakh crore, placing Indian Railways at the centre of future inter-city travel plans. He has also indicated that travel time between Bengaluru and Hyderabad could be brought down to about two hours under the new network.

For now, officials say the focus remains on finalising alignments, securing clearances and completing detailed project reports, before construction timelines can be firmed up.

Credit: Oneindia