Since I'm moving to the mainland shortly, I can laugh at each new revelation of sheer incompetence, moronity, hubris or baldfaced lies associated with this rail "project."  I thought it was a bad idea at $214 million/mile construction cost ($4.28 billion), but now that it's over $400 million/mile, I think it's a horrible idea.  That's over $6300 per linear inch, or $8300 for every man, woman and child on this rock.  

Japan recently completed a 93 mile extension of the Shinkansen to Hakodate for $4.7 billion, or approximately $50 million/mile.  While the Seikan tunnel underwater was completed decades ago, they still had to build many tunnels because of the mountainous terrain, as well as fencing, viaducts, ways for traffic to cross underneath or overhead, and stations.  

The pro-rail politicians claim it will help traffic, but it's not even going to the largest source of traffic on the island, UH.  I wish you all the best of luck, and I'll be watching in astonishment from afar.