1. Beijing Transportation Engineering Key Laboratory, Beijing University of Technology, Beijing, PR China
2. Center for Urban Transportation Research, University of South Florida, Tampa, Florida, USA
3. Department of Civil and Environmental Engineering, University of Hawaii at Manoa, Honolulu, Hawaii, USA
4. Traffic Operations Division, Texas Department of Transportation, Austin, Texas, USA
5. Washington State Department of Transportation, Quality Assurance and Transportation System Safety, Olympia, Washington, USA