Commuter rail is an outdated model of transportation, and does little to reduce car use or promote transit-oriented development.
"A surprising analysis by Harvard-educated urban planner Eric Beaton adds more meat to the bones of some faint but persuasive arguments that call into question the value of fixed-rail mass-transit systems. Beaton looked at development patterns around commuter-rail terminals over the past 100 years. His study, published in September by the Rappaport Institute for Greater Boston, contained some disconcerting results. One would think, for instance, that new commuter-rail stations might encourage development nearby. It turns out they don't. Areas around train stations are only modestly more developed than anywhere else. One would also think that new stations might encourage more use of public transit. That is also untrue. The number of people using transit to get to work is largely unchanged by the addition of new stations."
"As Beaton's study points out, back before widespread adoption of the automobile, rail stations were popular places for development. But cars changed the ways we live and work. Employers began to locate outside of cities, where land was cheap. People moved to the suburbs, lured by the prospect of owning their own plot of land. Today, even with high gas prices and crowded roads, people love the privacy, comfort, and extraordinary freedom they get from their automobiles.
Can we put the genie back in the bottle? I doubt it."