National/International Leadership and Service
- Member, Committee on Traffic Control Devices, TRB
- Member, Access Management Committee, TRB
- Secretary of TRB Access Management Research Committee
- Associate Editor of ITE Journal of Transportation
- Member, Committee on Major Activity Center Circulation Systems, AP040, TRB
- Member, Traffic Signal Operations Committee, Institute of Transportation Engineers (2013-2018)
- Paper Reviewer for the ASCE Journal of Transportation Engineering, Transportation Safety and Security, Advanced Transportation Studies, Journal of Public Transportation
- Paper Reviewer for the TRB Committees of Highway Capacity, Access Management, Traffic Control Devices, Major Activity Center Circulation Systems, and Traveler Behavior and Values
- Board of Directors, North America China Overseas Transportation Association (NACOTA, 2008-2010).
- Co-Chair of Conference Technical Committee, the 2007 Technical Symposium on Intermodel Transportation Development in Pan-Pacific Regions, Washington D.C., January, 2007
Professional Affiliation
- Fellow of Institute of Transportation Engineers (Since 2011)
- Member, American Traffic Safety and Services Association (ATSSA)
- Member, Southern District ITE and Alabama ITE