From Dallas, take I-75 North through Richardson and Plano to McKinney, about 30 miles. Take exit 40A (Louisiana St/Virginia Pkwy) and turn right at the first traffic light. Go 1.2 miles to Church St and turn left. Go four blocks, turn right on W. Lamar St, then next left onto N. Wood Street. The AOS office is about 200 yards down on the left, 515 N. Wood.
From the downtown Dallas DART (Dallas Area Rapid Transport) station, take the Orange Line out to Plano. Then take a taxi to the office in McKinney.
Dallas-Fort Worth (DFW) is the most convenient airport and the office is about 40 minutes away by rental car or taxi. Exit the airport, following signs to Route 121, the Sam Rayburn tollway. Take the tollway and drive 29 miles to the I-75 North exit, take I-75 North two exits to 40A, then follow "By car" directions above.