1. Office of Operations R&D, Turner-Fairbank Highway Research Center, FHWA, 6300 Georgetown Pike, McLean, VA 22101
2. Siemens Energy & Automation, Intelligent Transportation Systems, 6375 East Tanque Verde, No. 170, Tucson, AZ 85715
3. Civil Engineering Department, Purdue University, 1284 Civil Engineering, West Lafayette, IN 47907