Move Brilliantly.


About Aimsun

Aimsun is a leading international provider of software and services for traffic planning, simulation and prediction. 

Acquired by Siemens in 2018, Aimsun now counts on their support to continue building on over 20 years of experience in algorithms, software and operational know-how for mobility applications.

Thousands of mobility professionals worldwide in government, research institutions and private companies are successfully using Aimsun tools and services to model tomorrow’s smart mobility networks, today.


The Aimsun team

Aimsun team

Aimsun is an international team of technologists, data scientists, and transportation engineers. Always growing, the team now numbers nearly 100 highly qualified people working from 9 offices worldwide and collectively speaking more than 20 languages.


Aimsun company history

Follow our journey from a university research lab team to an international mobility software and services company.

1989 – 1997

• Members of the former LIOS (Simulation and Operations Research Laboratory) at the Polytechnic University of Catalonia (UPC) develop a microsimulator prototype. This microsimulator is eventually named AIMSUN2 (Advanced Interactive Microscopic Simulator for Urban and Non-Urban Networks).


• The company, originally known as TSS-Transport Simulation Systems, is officially founded on 11th November 1997. Technical development continues at the university lab but TSS opens an office in c/Tarragona in Barcelona, with a tiny core team dedicated to commercializing the software.

• TSS sells AIMSUN within a simulation environment called GETRAM (Generic Environment for Traffic Analysis and Modeling), which also contains a traffic network graphical editor (TEDI), a network database, a module for storing results and an Application Programming Interface for interfacing assignment models.


• Release of GETRAM 4.0


• TSS moves to a larger office on c/París in central Barcelona and begins to grow, steadily bringing in new developers – many of whom are still with us today


• TSS moves to a larger head office in Barcelona on Passeig de Gràcia. There are separate departments for Development, Projects, Marketing, Accounts and Management


• GETRAM becomes AIMSUN NG (New Generation), the world’s first integrated macroscopic and microscopic traffic modelling software; the package also includes integrated editing and simulation

• Aimsun Online pilot project in Singapore


• AIMSUN NG drops the caps and becomes Aimsun, adding mesoscopic simulation and Dynamic User Equilibrium assignment to the toolbox of version 6


• Aimsun 6.1 integrates Legion’s pedestrian simulation engine as an Aimsun plug-in


• The first branch office opens – in New York City


• Branch office opens in Paris, France

• Aimsun 7 includes hybrid mesoscopic-microscopic simulation

• Aimsun Online selected as platform for DSS in Interstate 15 San Diego ICM project


• We open a new branch office in Sydney, Australia


• Aimsun 8 incorporates full support for four-step travel demand modeling

• I-15 Integrated Corridor Management project in San Diego wins the 2013 ITS America award for Best Innovation


• CTF award for Operational Efficiency Program of the Year, awarded to I-15 Integrated Corridor Management project in San Diego.

• Our UK branch opens in London


• Aimsun 8.1 is launched, with a focus on enhanced visualization and version control

• Barcelona head office relocates to larger headquarters


• TSS rebrands and becomes Aimsun. Aimsun software becomes Aimsun Next, and Aimsun Online becomes Aimsun Live

• Aimsun opens an office in Singapore


Siemens Mobility acquires Aimsun


• Aimsun expands its product portfolio with the launch of Aimsun Auto – a software platform for large-scale testing of path planning algorithms for AVs.


• Launch of Aimsun Ride, for modeling on-demand transportation

• Launch of Aimsun Next 20, focused on modeling pedestrians, bikes and how we use public transportation

• Alex Gerodimos becomes new CEO.


Our logos through time