1. Assistant Professor, School of Transportation and Logistics, Dalian Univ. of Technology, Dalian 116024, China (corresponding author).
2. Associate Professor, School of Mathematical Sciences, Dalian Univ. of Technology, Dalian 116024, China.
3. Transportation Planner, Orange County, NC Dept. of Planning and Inspections, 131 W Margaret Ln., Hillsborough, NC 27278.
4. Professor, School of Architecture and Fine Art, Dalian Univ. of Technology, Dalian 116024, China.