The Cost of Gas Versus the Cost of Public Transportation

I'm trying to decide when the price of gas will have risen to a point that my commuting to work in the brutally expensive Music City Star would be justified. I think we're getting close to that point. If there is no longer a significant cost difference between auto and rail, the Star has a couple things going for it: 1) mass transit is more eco-friendly than one-dude-per-vehicle transit; 2) it would allow me to say to people, "Each morning I take the train into the city," making me feel less like the vanilla suburbanite I am.

I'll keep you posted on developments.