Colombo Suburban Railway Project was created in 7th of July 2016 with the commencement of Pre-feasibility Study in the Colombo Suburban Region of Sri Lanka Railway Network. Considering the JICA funded ComTRANS study carried out by the Ministry of Transport & Civil Aviation, and the Western Region Transport Master Plan prepared by the Ministry of Megapolis & Western Development, the Pre-feasibility Study of CSRP, was focused towards passenger and freight demands for Sri Lanka Railways by 2025 and 2035. This included identifying requirement of Infrastructure Development, Passenger Needs, Hauling Power transition from Diesel to Electric, Business Processes etc. Now, the project has moved from Pre-feasibility stage to Detailed Design stage. In this, construction of 105 Km of additional tracks, rehabilitation of 210 Km of existing tracks, development of Railway Stations and Multi-model Centres, replacing signaling system, development of maintenance facilities and acquisition of new Rolling Stock, will be considered and designed.

In addition, Railway Master Plan, (in parallel with Road and Port Master Plans) will be developed under the project.