All bus lines are operated by concessionaires under the supervision of SPTrans, providing business planning and management of public transport.

[1][2] Regional and radial bus routes within São Paulo are composed of four numerical digits in the range 0, 1, 2 ... 9.

The current four-digit bus route numbering system SPTrans uses today, where the last digit is an alphanumerical digit, was established in 1976, but was not fully implemented due to citywide changes that were carried out according to the development, and the management change within the São Paulo's city hall.

[3] During Marta Suplicy's administration, between 2001 and 2004, the city was again divided into nine operational bus areas citywide, only this time from 1 to 9 and there were some changes.

The current model of municipal public transport in São Paulo divides the city into nine different areas, and for eight of them (1 - Northwest, 2 - North, 3 - Northeast, 4 - East, 5 - Southeast, 6 - South, 7 - Southwest and 8 - West) lots were established for the distribution of companies and cooperatives that will provide transport services by buses, minibuses, vans and trolleybuses.