DURING THE MORNING RUSH HOUR (5:00-9:30 AM)
Go East on I-66. Take exit 62, towards Fairfax (South): right at the exit fork just off I-66 (where left goes to Vienna), then left fork to Fairfax (where right goes to Metro). Merge onto Nutley St. South and follow this through one traffic light (0.8 mi). Turn left onto Lee Hwy (Rt.29), and follow this for about 3 mi, through N. Lynn St., towards the Theodore Roosevelt Bridge. Merge onto I-66, and cross the Theodore Roosevelt Bridge, after which I-66 becomes Constitution Ave.
AFTER THE MORNING RUSH HOUR (AFTER 9:30 AM)
Go East on I-66, into DC (take no exits), over the Theodore Roosevelt Bridge, after which I-66 becomes Constitution Ave. Go East on the Constitution Ave., and make a left on 7th St. You are now headed North. Continue for approximately 1.5 miles, past the Howard University Hospital (where 7th Street has now turned into Georgia Avenue), then make a right on Howard Street (this puts you on campus). Make a right on 6th street. The physics building will be on your left.