Originally Posted by
ambyr
You might also want to mention that BWI has a light rail connection to Baltimore (and the northern suburbs as far as Hunt Valley). Unlike Amtrak, I believe it actually leaves from the terminal, so you don't have an extra shuttle bus connection to worry about. On the other hand, it moves at a snail's pace
I can confirm that it does leave from the terminal, way down by the international terminal.
And yeah, it's not the fastest system in the world either.