I think its a great idea.  A commuter railroad would be a viable alternative, especially when considering the stress of combat driving on the Alaska Speedway during rush hour traffic; not to mention all of the waiting whenever some ditch-diver holds up traffic while the police and para-medics go to work.  A ten minute drive to the station in Palmer (lots of parking there) sounds pretty go to me.  And then what if we had a local train line in Anchorage running from the station to the airport?  That underutilized spur could have sub stations in West Anchorage and Spenard, and it even has a lovely terminal at the airport for those that wish to connect there.