From Europe to China, and from the United States to India or South America, more and more cities are relying on the High Service Level Bus (BRT) to meet the mobility needs of their citizens while decongesting public space. Innovative and efficient, the BRT combines the advantages of the bus (lightness, agility) with those of public transport on its own site (speed, regularity, punctuality). By thus reinventing the bus mode, it gives a new dynamic to public transport in order to better meet the environmental, economic and social challenges of urban mobility.