From Richmond via I-95
Follow I-95 North to I-395 north (I-95 turns into I-395).
Continue on I-395 north to Exit 8B Washington Boulevard.
Follow Washington Boulevard to the Arlington Memorial Bridge.
Cross Arlington Memorial Bridge. Get into the left lane. The left lane will take you to Constitution Avenue.
Turn right onto Constitution Avenue.
Turn left onto 17th Street.
17th Street turns into Connecticut Avenue. Continue on Connecticut until you reach the 3000 block. The National Zoo will be located on your right at 3001 Connecticut Avenue.
