1. School of Traffic and Transportation Engineering, Xinjiang University, Shuimogou-District, Ürümqi 830017, China
2. Xinjiang Key Laboratory of Green Construction and Maintenance of Transportation Infrastructure and Intelligent Traffic Control, Shuimogou-District, Ürümqi 830017, China
3. School of International Business, Xinjiang University, Shuimogou-District, Ürümqi 830017, China