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.