With a growing pool of 38 fare-free public transport (FFPT) networks running in 2023, France is an active player in the field as evidenced by the existence of a national dedicated observatory: L’Observatoire des villes du transport gratuit (Observatory of Cities with Fare-Free Public Transport). During a study trip in the Paris region last March, we had the opportunity to meet Julie Calnibalosky, scientific coordinator at the Observatory. Here, Anna Tailliez explores the five main take-aways from her presentation.