List of the WCTRS SIGs
SIG 1 - Transport and Spatial Development
SIG 2 - Maritime Transport
SIG 3 - Safety Analysis and Policy
SIG 5 - Transportation Infrastructure Systems
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 - Urban Transport Policy Instruments