jon, you can go either way, it pretty much on the direct opposite from where you reach the beltway, and yes the beltway is 495.
you go about another 7>10 miles past the 270 branch off, continuing on 495. hope that helps....somewhat.
-andrew


andy watson on my 'Beer Goggle' Post:
AureiusX: You needlessly made an ass of yourself
JenovaFire: it was a good idea at the time
AureiusX: LOL
AureiusX: so was she