Cost has always been the wrench that thwarts plans to build high-speed rail in this country, writes Paul Nussbaum, but growing public interest -- and government support -- for fast trains may finally keep plans on track. However, "this country and the idea of high-speed rail is competing against a lot of investment opportunities around the world," noted George Bilicic at the Lazard investment bank. "You have to have stability of revenue."

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