Special Interest Groups have been created in order to facilitate the exchange of ideas between researchers interested in the same topic area. They have all been approved by the WCTRS Steering Committee.

• SIG-1 Transport and Spatial Development
• SIG-2 Maritime Transport and Ports
• SIG-3 Safety Analysis and Policy
• SIG-4 Transport Economic Regulation (new)
• SIG-5 Transportation Infrastructure Systems
• SIG-6 Information Communications Technology and Transport  (ICT)
• SIG-7 Urban Transport in Developing Countries
• SIG-8 Air Transport Research Society (ATRS)
• SIG-9 Urban Goods Movement
• SIG-10 Urban Transport Policy Instruments
• SIG-11 Transport and the Environment
• SIG-12 Travel Behaviour (new)
• SIG-13 Rail Transport (new)