The São Mateus–Jabaquara metropolitan corridor (Portuguese: Corredor Metropolitano São Mateus-Jabaquara), also called ABD Corridor (Corredor ABD) is a bus rapid transit line in Brazil, linking the city of São Paulo to three neighboring cities, Diadema, São Bernardo do Campo and Santo André, as well as (indirectly) Mauá. Operations started in 1988. Its other name references one letter per city (A for Santo André, B for São Bernardo do Campo, and D for Diadema), the same way the ABC region in Greater São Paulo is named. Sâo Mateus and Jabaquara are city districts within São Paulo's jurisdiction, borrowing their names for the bus lane as they were its original termini. Despite its name, no bus lines connect both sites directly; passengers interchange buses at a linking station. The system was rated the most satisfying transportation mode in the Metropolitan Region of São Paulo, with a 79% approval rate, surpassing the long-lasting winning streak of São Paulo Metro (74% approval rate), according to the National Association for Public Transport's (Associação Nacional de Transportes Públicos) 2011 survey. History In 1975, the São Paulo state government established a council to coordinate actions to improve the Greater São Paulo region, including transportation policies. The council, Codegran - Conselho Deliberativo da Grande São Paulo (Deliberative Council for Greater São Paulo), envisioned a comprehensive trolleybus network to assist the public transportation system in the region bonded to São Paulo Metro and the existing commuter rail systems at that time (the federal government-owned RFFSA and the state-owned FEPASA, later merged into CPTM network). The project started in 1984, as the National Bank for Economic and Social Development (BNDES) granted a loan for the works, although its conclusion was uncertain. Resumptions, loss of median strips in local avenues, and the path itself were all difficulties stated at that time. Construction was announced to start in 1985, aiming to carry 150,000 passengers a day and to replace a costlier, nonviable metro line for that region, though it was superseded with the announcement of line 18 of São Paulo Metro. Effective work started in 1985 when its future operations control center was erected after a ceremony hosted by the Governor of São Paulo, André Franco Montoro. In 1987, Montoro inaugurated the Piraporinha terminal. Only of lane had been completed - compared to of the complete project - and employing diesel-fueled buses rather than trolleybuses. Service was expanded in 1988, as the