I'm flying in to BWI on Saturday night and was hoping to take the train in. It looks like only Amtrak is running at that time (no MARC). Does anyone know how often the shuttle to the BWI train station runs on the weekends, and how long it takes? I called Amtrak and they said the shuttle takes 30 minutes (which I find hard to believe, but maybe that's right). They didn't know how often the train ran, so they gave me the number to the train station, but the train station's automated phone system keeps hanging up on me.

Any help anyone can give me would be greatly appreciated. I'm starting to get very frustrated! Thanks!