This study explores how cities can be transformed through the lens of slow mobility, encompassing active and electric modes such as walking, cycling and micromobility, made increasingly viable by the e-mobility revolution. It challenges traditional, car-centric urban design by analyzing how different mobility modes occupy space and how this space can be reclaimed and redesigned through slow mobility to improve public life. Following a methodology which is structured around two main components, it conducts a spatial occupancy analysis that compares slow and fast mobility in terms of movement and staying and develops spatial and design strategies. The framework applied to Via Filippo Baldinucci in Milan as a case study, where key urban locations such as school, library, park and public transportation stops, were redesigned in terms of the relation with the public spaces by supporting slow mobility. The results demonstrate that prioritizing slow mobility in urban areas leads to significant qualitative improvements. This study offers a holistic analytical and design approach to rethinking urban spaces which demonstrates that slow mobility is an effective tool to make more inclusive, people-centered and livable cities.