With the trends of rapid urbanization in developing cities and automobile dominance in
many countries, there is a need to explore policies and plans that will allow transportation to
enable quality of life for urban citizens in a sustainable manner. Mass public transportation systems,
such as Bus Rapid Transport (BRT) systems, are often cited in research and planning documents as
true alternatives to auto dependence for both urbanizing and developed cities. In view of this, the
sustainability state of the first Bus Rapid Transits System to be designed and implemented in Lagos
state, Nigeria was evaluated based on sustainable objectives in this research work. Data were
collected through the use of closed ended questionnaire that was administered to a cross-section of
BRT users using random sampling technique, the basics for the evaluation used was the Sustainable
Transport Appraisal Rating (STAR) as designed by the Asian Development Bank ADB. Findings
revealed that the overall rating of the system is marginally sustainable with the three core dimension
of sustainability rated as followed; economic sustainability as marginally economically sustainable,
social sustainability as moderately socially sustainable, environmental improvement as moderately
environmentally sustainable, and fourth bottom line-transport system efficiency as marginally
positive. Our study concludes that the system is marginally sustainable with some impacts needed
to be mitigated in the operation of the route such as improvement in quality of service and reliability
which will also have impact on its economic sustainability.