Here are directions for getting to Van Ness from Northern Virgina via Rt. 66 eastbound:
Take Exit 73 (the Key Bridge/Rosslyn exit). Go 2 1/2 blocks on Lee Highway, turn left on N. Lynn Drive, cross Key Bridge, turn left on M St, bear right on Foxhall Drive. Take Foxhall to its end on Nebraska Avenue, turn right, pass American University, cross Massachusetts Avenue, then turn right onto Van Ness Street. Cross Wisconsin Avenue and Reno Road, then turn left at Connecticut Avenue. Take next right onto Veazey Terrace. Free short-term visitor parking is available in the circle in front of Van Ness North.