The six Western Balkans (WeBa) countries, composed of Albania, Bosnia and Herzegovina, Kosovo, North Macedonia, Montenegro, and Serbia, have undergone major economic transformations over the past 15 years, although structural reforms began to stall in the mid-2000s. The Urban Mobility Initiative for the Western Balkans region was launched by the World Bank Group to conduct a high-level, comprehensive diagnostic assessment of urban mobility in the 10 selected cities in the WeBa region. The overarching aim of the assessment is to identify interventions for urban mobility-related challenges and potential opportunities where the World Bank Group may provide support. This comprehensive summary report presents the highlights of individual urban mobility assessments prepared for each of the 10 selected WeBa cities, provides a comprehensive review of urban transport provision and gaps, and identifies priority investment areas and key strategies to enable the urban transport transformation in cities across the region. The assessment in this report is organized in the following themes: institutional arrangement, financing, characterization of modes, infrastructure and services, and priority investment areas. These themes were discussed and confirmed with the cities at the concluding workshops. Drawing from the diagnostic assessment and discussions with the cities, the report then identifies key policies that the countries and cities can explore to accelerate the transformation of urban mobility in the short term.