This looks interesting. Never happen though!
http://www.dailymail.co.uk/news/art...-lets-riders-commute-far-railways-London.html
http://www.dailymail.co.uk/news/art...-lets-riders-commute-far-railways-London.html
. Maybe the great grand children may see something like it. But by then London will probably be underwater from the Great Global Warming floods.


Totally impractical - it won't go where cyclists want to go. It would be better to spend the money on restricting traffic and making some of the side roads into cycle only ways.