1. Center for Transportation Research, Tickle College of Engineering, University of Tennessee, 600 Henley Street, Knoxville, TN 37996, USA
2. MOE Key Laboratory for Urban Transportation Complex Systems Theory and Technology, School of Traffic & Transportation, Beijing Jiaotong University, Beijing 100044, China
3. School of Traffic and Transportation Engineering, Central South University, 22 Shao Nan Road, Changsha, Hunan 410075, China
4. Traffic Engineers, Inc., 801 Congress Avenue, Houston, TX 77002, USA
5. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong