This document summarizes a case study on Mumbai's Metro Line 1 public-private partnership project. The 11km elevated metro line has 12 stations and connects Versova to Ghatkopar. It was developed on a BOOT model, with a private consortium responsible for design, financing, construction, operation, and maintenance over a 35-year concession period. Key aspects covered include project structure, financing, and risk allocation framework. The project brings transportation and economic benefits to Mumbai through a modern metro system.