The Public Utility Vehicle Modernization Program (PUVMP) was started by President Rodrigo Duterte to replace outdated public transportation with more modern, low- or zero-emission vehicles like e-jeepneys. Due to the lack of coordination and consolidation among jeepney operators, a significant number of individual operators are currently competing for road space and overlapping routes. This condition worsens the Colorum epidemic in the country and affects PUV operations. This review paper was conducted to investigate the operations of the mini-bus, its sustainability, the contributions to the PPP, and its impact on the economy in the province of Davao del Sur. Air pollution, traffic congestion, scarce road capacity, and inefficient PUV operations are just some of the transport-related problems that the PUV modernization program can potentially solve, hence, this article premised a well-informed conclusion and recommendation for the existing phenomena under review. A systematic review of related literature and content analysis was conducted to encapsulate the recurring themes resulting in the operations of the mini-bus. Results showed that the legal framework, regulatory reforms, public-private partnership towards sustainability of mini-buses, and impact on the economy are among the mini-bus operations.