Coming from the south: Take Nicolls Road north from the LIE (495). Make a left turn into the SUNY Stony Brook main entrance (Entrance Drive). Then, make a left turn at the first light onto Circle Road, then follow Circle Road until you (finally) get to Campus Drive. Make a right onto Campus Drive and then the first left turn onto John S. Toll Drive. Turn right into the first parking lot. Walk to the Math Tower and go down the staircase and follow signs to S-240.
(The closer parking lot next to the Simons Center is for FACULTY ONLY)