HS2 will build more than 500 bridging structures – including over 50 major viaducts which will stretch for a combined total of 15km (9 miles) across valleys, rivers, roads and flood plains.
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The Colne Valley Viaduct is a bridge, under construction as of 2023, which will carry the High Speed 2 railway over the Colne Valley Regional Park and the Grand Union Canal, in Hillingdon, west London.
High Speed 2 (HS2) is a planned high-speed railway line in England, the first phase of which is under construction in stages and due for completion between 2029 and 2033, depending on approval for later stages.
Northern HS2 line set to be scrapped with costs 'out of control', Sky News understands. The planned railway - announced by the last Labour government but backed by successive Tory administrations - is intended to link London, the Midlands and the North of England but has been plagued by delays and rising costs.
The HS2 rail line has been given an unachievable rating by an official watchdog. It has been given a red warning for its first two phases - from London to Birmingham then onto Crewe - by the Infrastructure and Projects Authority.
How deep is HS2? It will be bored using tunnel boring machines (TBMs) launched from the western portal, near Old Oak Common Station. The tunnel will be 7.2km (4.5 miles) long, and at its deepest point, will run 50m (160ft) below ground.
How much will tickets cost? There is likely to be a premium of between 20 and 33 per cent for using the fast service. That would in theory push the cost of a London-Manchester Anytime ticket from £180 to £240 at 2020 prices, which works out at 6p per second.
Other groups opposing HS2 include the HS2 Action Alliance, The Wildlife Trusts and the Woodland Trust. The group has a chairperson, a treasurer and a campaign manager, relying on donations to pay them. In 2011, it made a fundraiser to pay its campaign manager Joe Rukin.
Britain only has a small section connecting London with the rail tunnel to mainland Europe. In terms of speed, HS2's planned top speed of 225 miles per hour (mph) could make it Europe's fastest rail network.
HS2's new British-built, bullet style trains will travel at up to 225mph on both high-speed and existing railway lines. We are building HS2 in phases. Our first phase of operation will link Birmingham Curzon Street and Old Oak Common in West London in 42 minutes.
Journeys between Manchester Piccadilly and London Euston will take just one hour and 11 minutes on HS2, 54 minutes quicker than today's fastest time by rail.