I just have a few minutes, or I would attach a couple of links for you (sorry!). I would look at the MARC Train and Metro websites and note where the lines run and where the stations are located. That would help you narrow your housing unit search to locations near a station or two.

On the Metro website, you can do a trip planner and have it tell you how difficult or easy it would be to get from a station to your work location. Beltway traffic in the morning tends to be bad between I-95 and around US 50 (NE quadrant on a map of DC). Usually, at least one of the major north-south routes: I-95, Balt-Wash Pwy, US 1, US 29 has some sort of issue every morning and evening.

Having said this, I've found that the Balt-Wash corridor has some pretty decent roads, when there's not wrecks on them, with several alternate routes. Also, at times this area is surprisingly rural, especially in Anne Arundel and Howard Counties.