Can you post the map? Could he have hoped on that road below 66 E.? What is that? Arlington Blvd.?
Drat. No, took the page down already. But you can recreate it easily enough. I found an address for Seven Corners Center of 6201 Arlington Blvd, Falls Church, VA 22044. Then used mapquest to get directions from there to your addy. It came out 16 miles and about 27 minutes of driving. You could consult a real map to see if there's a shortcut, of course.
Sorry couldn't be of more help...