I was just having a look around at transport systems worldwide and came back to a page closer to home on Wikipedia.
I know there is much debate about the Metro North and whether it should go ahead or not, but was also interested in seeing from Wikipedia that there has been a case or a need in the past to have a tunnel (similar to the Channel tunnel) built between Ireland and the UK..
Even if we had 20 billion (prob cost more now) to spend wouldn't it be a good idea to have an integrated rail network link to mainland Europe via the UK?
What are your thoughts on this and can you see it happening in the future?
http://en.wikipedia.org/wiki/Tusker_Tunnel