Runaway Train?

Runaway Train? - Freakonomics Blog - NYTimes.com: "Big infrastructure projects might be killed on the drawing board, but once under construction they will almost never be canceled, even by those who bitterly oppose them. No matter how high the cost overruns are or how disastrous the engineering mishaps may be (think the Big Dig), no elected official wants to abandon a half-built expressway, leaving a rusting blot on the landscape which screams testimony to the incompetence of government."