[Ren, Huanyu] Jimei Univ, Nav Inst, Xiamen 361000, Peoples R China.
[Du, Jianbang; Du, JB] Texas A&M Transportat Inst, Bryan, TX 77807 USA.
[Wang, C; Wang, Chao] Beijing Univ Technol, Coll Econ & Management, Beijing 100022, Peoples R China.
[Li, Zhenglong] Beijing Jiaotong Univ, Sch Econ & Management, Beijing 100044, Peoples R China.
[Yue, Xiongping] Wuhan Polytech Univ, Sch Management, Wuhan 430062, Peoples R China.