The MIO bus rapid transit system serves Cali, Colombia.
MIO is short for Masivo Integrado de Occidente, or “Western Mass Integrated.” It is the integrated bus rapid transit system of Santiago de Cali, Colombia’s major city in the Valle del Cauca region. The system uses dedicated trunk corridors, stations, and connecting feeder and complementary routes.
Metro Cali, a municipal public entity, was created to develop and manage the system. Although planning began earlier, the BRT approach was established as the preferred alternative in a 2002 national planning document. MIO began full service in its first phase on March 1, 2009.
The name can cause confusion because Colombia has several major urban transit systems. Bogotá is served primarily by TransMilenio, while Medellín is famous for its metro and integrated cable systems. MIO belongs specifically to Cali; its network was later complemented by MIO Cable, a gondola connection serving hillside communities.