Take I-95, I-270, or the other road of your choice, to Washington, D.C.'s Capital Beltway (I-495). If you are coming from the north, this involves taking I-95 South.

Then, take Exit 27 (from I-95) and then follow signs to U.S. 1 South (Exit 25 from the beltway). In other words, if you are coming south on I-95, take the right fork at the interchange with I-495 (following signs to Silver Spring and Bethesda), but then stay in the left lane and exit immeidately. The signs to U.S. 1 South will put you very briefly onto I-495 before you exit onto U.S. 1. The Google map below is useful and allows you to generate directions from any location.

Proceed approximately two miles south on U.S. Route 1. Turn right onto campus at the main gate (Campus Drive) Proceed straight through the rotary with an M. All CBMG buildings are adjacent to the Stamp Student Union. There is paid parking nearby, directly across a side street (Union Lane) from the Union. To get to this from the directions above (coming from U.S. 1), turn right on Union Lane, just after the Student Union, and then left into parking.

There is also free parking in Lot 1 (continue west of the Student Union along campus drive, past Cole Field House) and in Parking Garage 2 (PG2 meters are in effect, but spots in lot B are free after hours). There are other options; please read the signs to be sure you can park where you choose to park.

Resources:

HJ Patterson Hall on Google Local

Campus maps

Parking information