Department of Engineering and Public Works, City of Alpharetta, GA 30009, USA;
Department of Civil, Architectural and Environmental Engineering, Illinois Institute of Technology, Chicago, IL 60616, USA;
School of Highway, Chang'an University, Xi'an 710064, China;
Herbert S. Levinson Transportation Consultant, New Haven, CT 06492, USA;
Department of Civil, Architectural and Environmental Engineering, Illinois Institute of Technology, Chicago, IL 60616, USA;