This book provides a comprehensive and innovative decision-support framework for defining and measuring the complex interplay between urban characteristics and sustainable mobility across Italian provincial capitals. By integrating multi-dimensional indicators, it offers a quantitative methodology to identify the most effective policy interventions tailored to specific urban contexts. The volume addresses a critical challenge in contemporary urban planning: the need to move beyond "one-size-fits-all" solutions in the transition toward sustainable mobility. The research is built upon two main indicators: the Sustainable Urban Mobility (SUM) Index and the Urban Features (URB) Index that allow for a clustering of cities based not only on their mobility performance, but also on their socio-economic, geomorphological, and climatic determinants. The results constitute a reliable, innovative, and user-friendly reference for verifying, implementing, and financing urban sustainability projects. The main topics include: the nexus between urban components and mobility supply, methodological design for multi-dimensional urban-mobility dynamics, the definition and application of the SUM and URB Indices, clustering of Italian cities based on mobility performance and morphological characteristics, and tailored policy strategies for homogeneous city clusters.