6. Rapid Speed 2
Where: United Kingdom
* Total Outlay: $121–244 billion
Completed Year: Mid-2030s
High Speed 2 UK is being implemented by HS2 Ltd., which is supported by the Department of Transport. It is anticipated that Phase 1 alone will add 40,000 new jobs to the economy. The concrete needed to construct the 330 miles of track on the HS2 network will occupy an area almost equivalent to Manchester.

Twitter.com, FirstESource, and UK @HighSpeed 2
For those worried about the effects of the rail system on the environment, it was revealed that over two million new trees would be planted along the route between London and the West Midlands and that the increased number of commuters using the railway would result in a more than 25% reduction in carbon emissions.
