From Logan Airport:

Exit Logan Airport and take the Ted Williams Tunnel / Mass Pike West (I-90) toward Boston. Continue on the Mass Pike West approximately 25 miles to Exit 11A. Take Route 495 South to Exit 21B, West Main Street - Upton. Take a left at the second light onto South Street. Control Technology is your first driveway on the left.

From points North:

Take Route 495 South to Exit 21B, West Main Street - Upton. Take a left at the second light onto South Street. Control Technology is your first driveway on the left.

From points South:

Take Route 495 North to Exit 21B, West Main Street - Upton. Take a left at the second light onto South Street. Control Technology is your first driveway on the left.