The present thesis analyses the impact of the ban on shared e-scooters imposed by the City of Paris on traffic flows. This policy, implemented in September 2023, represents a unique case in the European shared mobility framework. Concerns about environmental impact, sidewalk occupancy, and safety led policymakers to impose restrictions, even though shared e-scooters are generally considered a sustainable alternative to cars. This research uses multimodal flow data recorded by thermal cameras in the city of Paris and applies the difference-in-difference (DiD) technique to assess the impact of the policy. The technique involves the definition of a control and a treatment group in order to determine the significance of the results.