TSS is the technology leader in transport modelling software. TSS introduced traffic micro-simulation on standard computers in the late 1980s with Getram. Today TSS continues to innovate with Aimsun: the only integrated, open and extensible transport modelling environment, which uniquely allows users to fuse static, dynamic and hybrid approaches within a single model.

TSS has its offices in Barcelona, Spain and distributors servicing over 1000 users in 50 countries. Aimsun licensees include government agencies such as ASFiNAG in Austria, MIDEPLAN in Chile, and the Department of Transport in the USA. Leading consultancies such as Halcrow, UK; DHV, Netherlands; WSP, Sweden; Stewart Scott, South Africa and UDEC in Japan use Aimsun to deliver consultancy services. Academic users and research partners include the Universities of California Berkeley, USA; Keio, Japan; Napoli, Italy, and Hannover, Germany.