São Paulo Metro: the two unattended lines, ten years apart
Line 4 (Yellow) has run with nobody aboard since 2010, in unattended GoA4 operation, and it is not the city's: a concessionaire, today Motiva Linha 4, operates it under a 30-year state PPP signed in 2006. The state-owned Metro needed ten more years on its Line 15 monorail, which opened in 2014 with an operator on every train, migrated to GoA4 in August 2024 and went fully unattended in March 2025 — a labour judge ordered the operators back in August 2025, the order was suspended within two weeks and later overturned on appeal. Line 5 and the six Line 6 stations opened in July 2026 are automatic but staffed, so 'driverless São Paulo' means two lines, not the network. Line 4 also drew a rare Brazilian ruling on biometric consent: platform-door cameras read passengers' reactions to adverts in 2018, and in May 2023 an appeal court raised ViaQuatro's collective damages from R$100,000 to R$500,000.
Line 4 carries about 570,000 passengers on a working day at a minimum headway of 90 seconds, 75 seconds at peak (concessionaire figures); Line 15 has run with no staff aboard since March 2025.
🎓 Lesson
A GoA4 rating is a licence, not a practice. Line 15 was built for unattended running in 2014 and needed ten years, a supplier validation and three court decisions to get there — while the line's own extension to Cidade Tiradentes slipped to a 2036 projection.
Evidence🏛️ Official
Scale🏙️ City-wide
FundingState of Sao Paulo: Line 4 publicly built and operated under a 30-year PPP concession, Line 15 publicly built and operated by the state Metro company
Sources
↗ Motiva (former ViaQuatro) — about Line 4Operator page: PPP concession of 30 years signed in 2006, service 'em junho de 2010', 12.8 km, 11 stations Vila Sonia-Luz, 'driverless' operation, '570 mil pessoas' per working day, minimum headway 90 seconds and 75 seconds at peak demand. Caution: other Motiva releases and Wikipedia quote ~700,000 and ~800,000 per day; the entry uses the operator's current page figure and does not average them.
↗ Galaxia (PUC-SP) — 'Automacao e agencia humana na Linha 4-Amarela do metro de Sao Paulo'Peer-reviewed. States the mode chosen was UTO, 'sem agente a bordo', explicitly not DTO ('operacao automatica com agente'), i.e. nobody aboard in a driving or supervisory role. Also documents the counterweight: station staffing ended up larger than planned and staff accumulate security and fallback-driving duties.
↗ Diario do Transporte — Line 15 begins fully automated operation (14 Mar 2025)'A partir deste fim de semana, sabado, 15, e domingo, 16 de marco' the monorail runs GoA4/UTO; Metro says 'nenhum operador perdera o emprego'; the Metroviarios union and the national federation say the system 'nao e seguro como dito pela empresa e pode colocar a populacao em risco'.
↗ TRT-2 (labour court) — sentence ordering operators back aboard Line 15Court's own newsroom: the 14a Vara do Trabalho da Zona Leste-SP ruled on 22 Aug 2025 that operators must be present 'em todas as composicoes da Linha 15-Prata', 30 days to comply, daily fine of R$5,000, citing evacuation from a monorail viaduct about 15 m above the street.
↗ Mobilidade Sampa — TRT suspends the order (2 Sep 2025)'O Tribunal Regional do Trabalho (TRT) acolheu, nesta terca-feira (2), um recurso apresentado pelo Metro', granting 'efeito suspensivo a decisao que determinava o retorno dos operadores embarcados'; automated running 'segue em vigor', 'sem operadores embarcados'.
↗ Metro CPTM — appeal court clears unattended running on Line 15TRT-2's 18a Turma granted the Metro's appeal and dismissed the union's public civil action, finding no technical evidence that removing onboard operators raises risk. Also the origin of the ten-year gap: the line ran for years with an employee aboard amid difficulties validating the Bombardier (now Alstom) systems, migrating to GoA4 only in August 2024. Direct fetch blocked (403); verified through search results reproducing the article text.
↗ Diario do Transporte — damages raised from R$100,000 to R$500,000 (16 May 2023)'A 8a Camara de Direito Publico do TJSP elevou de R$ 100 mil para R$ 500 mil a indenizacao coletiva a ser paga pela ViaQuatro'; 'o acordao e de 10 de maio'; equipment sat in platform doors at seven Line 4 stations and existed to capture reactions to advertising, not for security or train operation; damages go to the Fundo de Defesa de Direitos Difusos.
↗ Idec — consumer body that brought the actionPlaintiff's account of the same case: public civil action filed 2018, injunction in September 2018 removed the equipment, first instance awarded R$100,000, raised to R$500,000 on appeal by Idec, the Defensoria Publica and the Ministerio Publico. Direct fetch blocked (403); verified through search results.
↗ Motiva — Line 5 (Lilac) FAQOperator states Line 5 trains are automatic because of CBTC but 'pode receber um upgrade' to driverless operation, which would require working platform doors. Basis for excluding Line 5 from the unattended count.
↗ CNN Brasil — Line 6 opens its first six stations (2 Jul 2026)Six stations opened on 2 July 2026 in 180 days of 'operacao assistida' with 'circulacao controlada dos trens'; free travel, weekdays 10h-15h only; Acciona builds and the concessionaire operates for 19 years. No driverless claim is made, so Line 6 is not counted as unattended.
↗ Metro de Sao Paulo — transparency portal, demand datasetThe state operator publishes monthly passengers carried per line in open format; basis for the statement that ridership, not punctuality or headway performance, is what is actually published.
📎 Cite this project
1001 Smart Cities (2026). “São Paulo Metro: the two unattended lines, ten years apart” — São Paulo, Brazil. The Smart City Atlas. https://1001smartcities.org/projects/sao-paulo-metro-driverless/ (last verified 2026-07-26). Data: CC BY 4.0.
The underlying data is free to reuse with attribution — see the open data page.
