This chapter presents urban mobility systems and their characteristics. It provides an overview of daily mobility and the use of modes of transport at an international scale. The chapter reviews modes of transport and their links with urban development and the policies implemented. Population growth translates into urban growth. Echoing the notion of demographic transition, urban transition refers to a phenomenon of rapid urbanization. The distribution of populations and activities in urban space conditions travel, just as the development of infrastructure, transport services and travel flows influence urban forms. The development of mobile Internet and real-time geolocation during the 2000s made information the keystone of the mobility system. The chapter focuses on personal motorized modes, private cars and motorcycles, which are distributed very unevenly on a global scale, and which generate social differentiation and inequalities in mobility. Active transport is too often neglected, although walking remains the main mode of daily travel.