United Kingdom, May 20 -- Balfour Beatty VINCI has taken a major step forward with the construction of two parallel viaducts that will carry HS2 trains over the M6 near Birmingham Airport, with the first section of structural steelwork now complete. To reduce disruption for motorists, the twin 320-metre-long M6 South viaducts are being assembled to one side and will be slid over the road over a series of weekends, with each section pushed out before later sections are added behind them. The first viaduct to be built is the 'East Deck', which will carry two tracks taking trains towards London. The first section - which stretches for 119m - will be slid out over a slip road next to the motorway during the weekend of 7th/8th June. The next sta...