||The South Luzon Expressway (SLEX), officially known as Radial Road 3 or R-3, is a network of two expressways that connects Metro Manila to the provinces of the CALABARZON region in the Philippines. The first expressway is the Metro Manila Skyway System, operated jointly by the Philippine National Construction Corporation (PNCC) and Citra Metro Manila Tollways Corporation (CMMTC), while the second expressway, the South Luzon Tollway, is operated by the South Luzon Tollway Corporation, a joint venture of the PNCC and the Malaysian company MTD Capital Berhad.
The expressway starts in Manila's Paco District at President Elpidio Quirino Avenue and passes through the following cities and municipalities: Manila, Makati, Pasay, Parañaque, Taguig and Muntinlupa in Metro Manila, San Pedro, Biñan, Santa Rosa City, Cabuyao and Calamba City in Laguna, Carmona in Cavite, and Santo Tomas in Batangas. It terminates at Calamba City, 62 kilometers south of Manila.
In 2006, the South Luzon Tollway segment underwent rehabilitation through the SLEX Upgrading and Rehabilitation Project, which rehabilitates and expands the Alabang Viaduct as well as the road from Alabang to Calamba, and eventually connect the expressway to the Southern Tagalog Arterial Road to Batangas.
It will be the Philippine's longest expressway when the rehabilititation and it's connection to the Southern Tagalog Arterial Road is complete, covering up a distance of 118 kilometers.
The stretch of the future highway that aims to connect the South Luzon Expressway (SLEX) to the Southern Tagalog Arterial Road (STAR) Tollway is slowly taking shape as shown by the photos on this page. The SLEX starts from Manila and ends in Calamba City in Laguna, while the STAR Tollway, a.k.a. Apolinario Mabini Superhighway (AMS), starts from Sto. Tomas, Batangas and ends in Batangas City.
With the connection, travel time from Manila to Batangas City would be further reduced and rendered more efficient for cars, trucks and buses, especially to those using the RORO service of the Strong Republic Nautical Highway to the Visayas and Mindanao.