The project will add a second track to the existing single track connecting Sucat and Alabang stations. By adding 3.97km of rails, two-way traffic will be able to operate simultaneously for the first time on that section. Currently the line is only double-tracked from Tutuban to Sucat.

Contract awards and start of construction are targeted for the 3rd quarter of 2015, and the winning bidder will have 200 calendar days to complete the construction. The submission and opening of bids is set for June 9th 2015.