The LRT Line 6 aims to provide rail transport options to 45 percent of Cavite's population which are concentrated on the cities of Bacoor, Imus and Dasmariñas.

Some of the historical right-of-way is now shared between the Colonel Jesus Villamor Air Base and Ninoy Aquino International Airport.

[5][6] There were no plans to rebuild a line to Cavite until the 1990s, when the 1993 Updated Traffic and Transport Management Plan, which proposes the network of five LRT lines, including the sixth line that would run from Baclaran to Zapote in Las Piñas for 8 kilometers (5.0 mi), was proposed by the Public Estates Authority (PEA, now the Philippine Reclamation Authority), and the Australia-based TGM completed the pre-feasibility study in 1997.

[7][8][9] The project was also identified in the Metro Manila Urban Transportation Integration Study by the Japan International Cooperation Agency in 1999.

It aims to extend the line to Bacoor, Cavite with a target start of construction in 2014 and opening date in mid-2015.

[14] The line in its current form has a targeted partial opening date on November 16, 2024 and will be fully operational by 2031.

[20][21][22] Although sixteen firms showed interest in the LRT Line 6 project by sending representatives to a pre-qualification conference last February, namely: Aboitiz Equity Ventures, Inc.; Ayala Corporation; Bombardier; CFP Transaction Advisors; Daelim Industrial Company Ltd. (now DL E&C); DMCI; Egis; First Metro Investments Corporation; Metro Builders Corporation; Metro Pacific Investments; Mott MacDonald; Ove Arup & Partners; Prime Asset Ventures, Inc.; Robinsons Land; San Miguel Corporation; and SYSTRA.

The new proposal will branch out its railway network in Las Piñas, Muntinlupa, and Parañaque where large-scale subdivisions are situated.

As of December 2020, the proposal has passed the stringent qualifications set by the Department of Environment and Natural Resources, prompting to issue an Environmental Compliance Certificate (ECC) on February 7, 2020.

[24] The project is now under review by the NEDA-ICC alongside other unsolicited proposals such as the Metro Manila SkyTrain and the MRT Line 10.

The line is 16 kilometers (9.9 miles) long with 10 stations and will have a single track section between NAIA and Sucat Road.

Line 6D's Starmall station is located on a vacant lot beside Alabang exit of the South Luzon Expressway.

The trainsets will also be arranged into a four-car formation reflective of newer-generation light rail vehicles (LRVs) used on Line 1.

The use of the term "commuter rail" for the rolling stock made it ambiguous as to whether or not the line will use LRVs or high-capacity trainsets.

The project proposes to use a single-articulated, six-axle, standard floor car type with eight passenger doorways (four on each side).

[26] The 2020 study recommends that the line will use island platforms due to its compact size and costs less to construct.

The design for the elevated stations will be based on the Yurikamome automated guideway transit system in Tokyo.

[1] Lake Front station of Line 6C will also be built partially underground due to the conflicting pillars of the Metro Manila Skyway Sucat exit ramp.