£1.7 billion "flyunder" could replace ageing A4 into London

A new main A-road into Central London could be completed within just three years, chiswickw4.com reports.

The current Hammersmith flyover is in dire need of modernisation, as the decaying stretch of 53-year old road could soon prove to be dangerous if left for much longer. As such, a number of new proposals have been put forward in order to improve access to Central London for the 90,000 tourists, commuters and business travellers who use the route every single day.

The newest suggestion is a so-called “flyunder” which would see vehicles pass through a two and a half mile tunnel dug underneath the city streets.

What helped this scheme grab attention, though, was the fact that developers claim it could be finished and opened within just three years.

All this would come at a cost, though, with early estimates saying it could work out to be at least £1.7 billion, which is a great deal more expensive than the alternative option (a “cut and cover”), which would be a relatively small £218 million by comparison.

Whilst undoubtedly pricey, the flyunder idea already has a fan in London Mayor Boris Johnson, who hailed the plans as being “really visionary”. He also added that its huge cost may not be as stark as first thought, because taking the road underground could then free up prime riverside plots of land which in themselves could be worth £1 billion.

Speaking to standard.co.uk, Hammersmith Council leader Nicholas Botterill added: “Each of the options has pros and cons, but we are now clear that they are possible and, in some cases, may even be self-financing – which is an important factor for taxpayers.”