Traffic A15 Benelux, the NetherlandsThe International Symposium on Transportation and Traffic Theory, ISTTT, is the premier gathering for the world’s leading transportation and traffic theorists, and those who are interested in gaining (or contributing to) a deeper understanding of the field. ISTTT was organised for the first time in 1959. In 2013 the 20th edition will be held in Noordwijk, the Netherlands.

ISTTT’s International Advisory Committee decides which university will organise the symposium. Then a scientific committee is formed, to monitor the quality of the program.