1. Associate Professor, School of Traffic and Transportation, Beijing Jiaotong Univ., 100044 Beijing, People’s Republic of China (corresponding author).
2. Professor, Dept. of Transportation Studies, Texas Southern Univ., 3100 Cleburne Ave., Houston, TX 77004; and Yangtzi River Scholar, Beijing Jiaotong Univ., 100044 Beijing, People’s Republic of China.
3. Graduate Research Assistant, School of Traffic and Transportation, Beijing Jiaotong Univ., 100044 Beijing, People’s Republic of China.
4. Director, Professor, Beijing Transportation Research Center, 100055 Beijing, People’s Republic of China.
5. Engineer, Beijing Transportation Research Center, 100055 Beijing, People’s Republic of China.