I'm at school, but I got on
. You know that access road that goes around the entire airport, namely behind the cargo stuff and right under the approach for 27R, 27L, well it also goes under 9L, 9R. You simply go westbound on Griffin off US-1 and make a right turn onto the access road just after the Griffin/US-1 intersection, then at the access road it splits off to the 9's or the 27's, head eastbound. It will wrap you around the airport and just follow it till you reach 27R.