Take the Dulles Access Road or Route 267 Toll Road East towards Washington. Follow signs for I-66 East/Washington. Take I-66 East Washington exit. Follow I-66 East about eight miles, And take Exit 75, the Route 110 South/Pentagon/Alexandria Exit (after exit 73 be prepared to cut over to the far right lane for exit 75). Follow Route 110 South for about three miles, past Arlington Cemetery and the Pentagon. Take lane marked Route 1 South/Alexandria. Stay straight on Route 1 South Crystal City. Take the first exit marked 15th Street South/Pentagon City. At the light turn right onto 15th Street South. Follow for two blocks. At the light, turn right onto South Fern St. Residence Inn Pentagon City is located on the right at the corner of Army Navy Drive.