Public transport in Lagos is characterised by informal minibuses and the Bus Rapid Transport (BRT) system, a public-private partnership introduced in 2008. As an answer to the increasing pressure on the city’s limited space for road transport, Lagos State Government opened the first line of a metro rail system in September 2023 as a new era of mass passenger transport. This study examines whether the “Blue Line” has been able to realise government’s promise of a cost-effective and sustainable means of transport.