Stéphane Mollier participated to the MATTS conference. This congress hold from October17,2018 to October19,2018 and took place in Delft. The conference consists of plenary talks during the 3 days. Many topics were covered including: traffic modeling, coupling between physical models and data-based models, model with mixed bike and car traffic, Macroscopic Fundamental Diagram based model etc. Stéphane presented his work during one of these talks and he met few PhD Students and researchers.