<p>Mumbai Metro line 2A is part of the major Infrastructure overhaul being carried out in Mumbai under Mumbai Metropolitan Region Development Authority (MMRDA). This line is planned from Dahisar in the northern boundary of the suburban city to Andheri in the heart of the suburbs. The overall length of the elevated corridor is about 20,6km with 17 stations, each of 185m length. The proposed metro line shall provide interconnectivity among the existing Western Express Highway, Western Railway, other existing and proposed metro lines. It is expected to reduce the traffic on highly congested suburban road network as well as the Western Express Highway. It is also expected to reduce the passenger load on the western line of the suburban railway network. This paper presents the various aspects of planning, design and construction considered for this project keeping in view its complexity with respect to location, space and time constraints.</p>