If you're talking about high-speed rail, I think the biggest thing the government could do would be to expedite the study, get it out of the way and get to a decision point so that we can start to move on land assembly and engineering studies. Those are nowhere near as expensive, of course, as the construction costs, but they're absolutely a precondition to being able to get anywhere.
On May 14th, 2009. See this statement in context.