1. Department of Fire Protection Engineering, Southwest Jiaotong University, Chengdu, Sichuan, China
2. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, Anhui, China
3. State-Province Joint Engineering Laboratory of Spatial Information Technology of High-Speed Rail Safety, Chengdu, Sichuan, China
4. School of Transportation and Logistics, Southwest Jiaotong University, Chengdu, Sichuan, China
5. National United Engineering Laboratory of Integrated and Intelligent Transportation, Southwest Jiaotong University, Chengdu, Sichuan, China