Baku, January 10 (AZERTAC). A controversial new high-speed rail line between London and Birmingham has been given the go-ahead by government. This first phase of High Speed Two (HS2) could be running by 2026, later extending to northern England. Transport Secretary Justine Greening has announced extra tunnelling along the 90-mile (140km) first phase in response to environmental concerns. Opponents also dispute government claims the whole project will cost £32bn and deliver benefits worth £47bn. The first phase of the project would cut London-Birmingham journey times, on 225mph trains, to 49 minutes, Ms Greening said. This would be followed by a second phase of Y-shaped track reaching Manchester and Leeds by about 2033. Connections to existing lines should then cut journey times between London, and Edinburgh and Glasgow, to three-and-a-half hours. Ms Greening called the line "the most significant transport infrastructure project since the building of the motorways". "By following in the footsteps of the 19th Century railway pioneers, the government is signalling its commitment to providing 21st Century infrastructure and connections - laying the groundwork for long-term, sustainable economic growth," she said. The government estimates that the project could eventually result in 9 million road journeys and 4.5 million journeys by plane instead being taken by train every year. "HS2 is therefore an important part of transport`s low-carbon future," Ms Greening said. There had been almost 55,000 responses to the consultation process on the project, which clearly "generates strong feelings, both in favour and against the scheme", the minister said: She pledged a commitment to "developing a network with the lowest feasible impacts on local communities and the natural environment". "I have been mindful that we must safeguard the natural environment as far as possible, both for the benefit of those enjoying our beautiful countryside today and for future generations." Revisions to the route had halved the number of homes at risk, as well as reducing by a third the number due to experience increased noise, she said. Changes to the plans, Ms Greening said, also meant that "more than half the route will now be mitigated by tunnel or cutting" and included new or extended tunnels at: Amersham in Buckinghamshire; Ruislip in north-west London; Greatworth in Northamptonshire; Turweston in Buckinghamshire; Chipping Warden and Aston le Walls in Northamptonshire; Wendover in Buckinghamshire; and Long Itchington Wood in Warwickshire. However, the plan would be welcomed by "businesses up and down the country", said John Longworth, director general of the British Chambers of Commerce. "Britain cannot continue to `make do and mend` when it comes to its substandard infrastructure. Fundamentally, our global competitiveness is at stake," he said. Stephen Joseph, chief executive of Campaign for Better Transport, said: "We`re pleased to see the government investing in rail, rather than roads and aviation, and acting on some of the local environmental concerns surrounding HS2." But he went on: "The process for deciding on the London-Birmingham part of HS2 has been too narrow and people feel left out. "In consulting on the lines north of Birmingham, the government needs to involve people earlier with greater discussion of alternative options, including ways rail investment can support low-carbon growth in the communities served, and also how any new lines will integrate with existing networks and improve local as well as long-distance transport." Are you for or against a new high-speed rail line between London and Birmingham? How will you be affected if the new rail line is approved? Send us your comments using the form below.