Yeah, most of the Amtraks stop there (if not all), but I don't think they're any more frequent. Significant change in cost, too, I belive about 3x as much.

I haven't looked at the MARC frequency recently, either. I'm only going on memory. I doubt it has changed much, though.

Maryland should be looking to do this on their own, and I can't imagine why they haven't. The more they grow BWI, the better it is for them. Giving people easier access to DC certainly will help them grow BWI. (Hey, they didn't put Washington in the name for nothing, right?) And it seems to me they have a couple things in their power that they could do to make that access better.

In the end, for me personally, it doesn't matter. I'm here at PIT, I do travel to the DC and Baltimore areas for work, but at this distance I'm unlikely to start flying there anytime soon. With all the crap security and stuff these days, it would take almost as long as driving considering door to door time. But given what they're trying to do at BWI (they'd like to grow international traffic, for instance, they have that rebuilt international concourse) I do sometimes find it baffling they haven't done more to enhance the transit connection to DC.