Impact of Signal Preemption on the Operation of the Virginia Route 7 Corridor Darcy Bullock Associate Professor Purdue University School of Civil Engineering West Lafayette, IN 47907 darcy@purdue.edu 765/494-2226 Juan M. Morales President, J.M. Morales & Associates, P.C. 11320 Dockside Circle, Reston, VA 20191 JMMassoc@aol.com 703/648-8691; Bobby Sanderson, Jr. ITT Systems 6300 Georgetown Pike McLean, Virginia 22101 bs_jr@hotmail.com 703-285-2721.