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From Washington D.C.'s National Airport (395)
- Follow signs for 395 North – Washington: you will be on the George Washington Parkway toward Washington, D.C.
- Take exit for 395 North – Washington. Keep to the right and continue to follow signs for 395 North. Take the exit on the right for L'Enfant Promenade.
- Stay to the right, following signs for L'Enfant Promenade.
- At the bottom of the exit ramp, continue to the right at the stop sign (this will put you onto D Street Southwest). Stay on D Street (in the left lane), and just beyond the first traffic light, IMMEDIATELY, make a left turn into the underground parking garage of the Aerospace Center Building located at 901 D Street Southwest.
From Dulles Airport
- Take Dulles Access Road (Route 267) to I-495 South.
- Take I-66 East, toward Washington D.C.
- See Alternate if you're driving Eastbound from 6:30am - 9:30am, and Westbound from 3:30pm - 6:30pm. I-66 is a High Occupancy Vehicle (HOV) road during those peak hours and HOV cars must have at least 3 passengers or face a possible fine of $75.00.
- After crossing the Potomac River, I-66 becomes Constitution Avenue. Stay on Constitution Avenue. Make a right-turn onto 7th Street.
- Stay on 7th Street. Make a right-turn onto D Street SW. Our offices are in a gray, ten-story modern building on the right side of the second block (901 D Street SW).
- Turn right into the Parking Garage located underground of the Aerospace Center Building, located at 901 D Street Southwest.
From the L'Enfant Metro Station
- Come up the Metro Stairs and exit the Metro Station using the "9th & D Street SW" or "L'Enfant Plaza" exits only.
- For more Metro Transit information, including a map of Metro routes, please visit the Washington Metropolitan Area Transit Authority website.