Having visited many places where rail really works and moves hundreds of thousands, even millions, daily, I believe that in it and its value. All transport has hazards, especially in areas prone to earthquake or flooding. Resisting proven ideas because of initial costs or potential hazards only makes learning from the mistakes of others more valuable. My grandfather said intelligent people learn from their own mistakes, but wise people learn from the mistakes of others. Sadly, it seems that greedy people just repeat the mistakes and protect themselves from being sued for doing so.Respectfully,C.