Submitted on: 12 July 2018.
Revised on: 12 August 2018.
Accepted on: 03 October 2018.
___________________ACCIDENT ANALYSIS AND PREVENTION
Submitted on: 16 May 2018.
Revised on: 05 September 2018.
Accepted on: 24 September 2018.
___________________ACCIDENT ANALYSIS AND PREVENTION
http://reply.papertrans.cn/1/1/72/72-33.png
http://reply.papertrans.cn/1/1/72/72-34.png
http://reply.papertrans.cn/1/1/72/72-35.png
http://reply.papertrans.cn/1/1/72/72-36.png