South Luzon Expressway

The South Luzon Expressway (SLEX), signed as E2 of the Philippine expressway network and R-3 of the Metro Manila arterial road network, is a controlled-access highway that connects Metro Manila to the provinces in the Calabarzon, Mimaropa and Bicol Region on the island of Luzon in the Philippines. The expressway has a length of 49.56 km, traveling from its northern terminus at the Magallanes Interchange in Makati to its southern terminus at Santo Tomas, Batangas, connecting it to the Southern Tagalog Arterial Road (STAR Tollway). A portion of the expressway from the Magallanes Interchange to the Calamba Exit is part of Asian Highway 26 of the Asian highway network. It will be the longest expressway in the Philippines starting with the completion of Toll Road 4 surpassing the Subic–Clark–Tarlac Expressway (SCTEX) as well as providing a gateway to Visayas upon the completion of Toll Road 5.

The expressway also serves as a major utility corridor, carrying various high voltage overhead power lines and an oil pipeline. Notable power lines using the expressway's right of way for most or part of their route are the Sucat–Paco–Araneta–Balintawak transmission line, and the Biñan–Calamba and Calamba–Bay lines. The Magallanes–Alabang section of the expressway was also used to carry the Batangas–Pandacan oil pipeline.

The expressway was built in the late 1960s to develop areas adjacent to Metro Manila, particularly the south. Originally spanning from Magallanes, Makati to Alabang, Muntinlupa, it was extended southward to Calamba, Laguna in the late 1970s. In 1995, the Magallanes–Alabang section became part of the Skyway System's at-grade section. Rehabilitation efforts on the expressway followed, lasting from 2006 to 2009. Operations were transferred from Philippine National Construction Corporation (PNCC) to the South Luzon Tollways Corporation (SLTC) and Manila Toll Expressway Systems (MATES) on May 2, 2010. Additionally, it is connected to the Southern Tagalog Arterial Road in Batangas, through the Toll Road 3 project (Calamba–Santo Tomas) that was constructed from 2007 to 2010, inaugurated on June 15, 2010, and opened to the traffic six months after its inauguration in December 15, 2010.

Route description


The South Luzon Expressway cuts southwards from Metro Manila up to the provinces in Calabarzon. The expressway consists of two sections: the 13.43 km Skyway At-Grade segment, which runs underneath the Skyway from Magallanes Interchange in Makati to Alabang Exit in Muntinlupa, and the 36.13 km South Luzon Tollway segment, also called the Alabang–Calamba–Santo Tomas Expressway (ACTEX), from Alabang to Santo Tomas, Batangas. Skyway At-Grade operations are held jointly by the Skyway Operations and Maintenance Corporation (SOMCO) and SMC Skyway Corporation (formerly Citra Metro Manila Tollways Corporation), while the South Luzon Tollway segment of SLEX is held by SMC SLEX, Inc. (formerly South Luzon Tollway Corporation), a concessionaire operated by Manila Toll Expressway Systems, Inc. (MATES) and a joint venture of the Philippine National Construction Corporation and the San Miguel Corporation-backed PT Citra Marga Nusaphala Persada Tbk group of Indonesia. Additionally, the Alabang Viaduct is also known as SLEX Toll Road 1 (TR1), while the section from Filinvest Exit to Calamba Exit in Calamba, Laguna is also known as SLEX Toll Road 2 (TR2) and the section from Calamba Exit to Santo Tomas Exit is also known as SLEX Toll Road 3 (TR3).

The South Luzon Expressway starts as the physical extension of Osmeña Highway past the Magallanes Interchange, where it also meets Circumferential Road 4, particularly EDSA. The expressway runs through 49.56 km, spanning the cities of Makati, Pasay, Taguig, Parañaque, and Muntinlupa in Metro Manila and the provinces of Cavite, Laguna, and Batangas. From its northern terminus at Magallanes Interchange, the expressway follows a straight path southeast in parallel to the PNR South Main Line until the Bicutan Exit, where it slightly bends to the south towards the Alabang Exit. Two service roads run on either sides of the expressway from Sales Interchange to Alabang Exit, namely: West Service Road and East Service Road. Bicycle lanes are also present on the outermost lane of the toll-free northern section of the expressway, between the Magallanes and Sales Interchanges.

At the Alabang Exit, SLEX ascends to the Alabang Viaduct, a 1.242 km, eight-lane viaduct over the Manila South Road through Alabang. After its descent at Filinvest Exit, SLEX mostly parallels the Manila South Road in Muntinlupa and northwestern Laguna, passing through the Susana Heights Exit connecting it to the Muntinlupa–Cavite Expressway. It continues as a straight roadway lined with billboards and passing through residential and industrial areas. Past the San Pedro Exit, the expressway then curves and ascends past the Petron and Caltex service areas. Past Santa Rosa Exit, SLEX narrows with guard rails as the median divider. At the Calamba Exit, the Pan-Philippine Highway concurrency ends as it leaves the expressway towards the west as Maharlika Highway. Past such exit, the expressway further narrows without exits and with bridges built with wide shoulders to accommodate future widening. It follows a curved route paralleling the Pan-Philippine Highway (Maharlika Highway) from Calamba to Santo Tomas, Batangas. The expressway then curves as it enters Santo Tomas before it ends at kilometer 57.5, continuing towards Batangas City as the STAR Tollway.

Planning and construction
The South Luzon Expressway was originally built during the 1960s as the Manila South Diversion Road, South Superhighway, or Manila South Expressway as newer roads used to travel from and to Manila. Located then in the province of Rizal, the original stretch of the expressway, spanning approximately 15 km from EDSA (Highway 54) in Magallanes, Makati to Alabang Exit in Muntinlupa, was constructed beginning in 1967 and was completed on December 16, 1969. It is the second roadway project completed by the Philippine National Construction Corporation, after North Luzon Expressway.

Starting in 1973, the 29-km extension from Alabang to Calamba, Laguna was begun and completed in 1976. It included the 1.2 km Alabang Viaduct in Alabang and six interchanges.

In 1982, South Superhighway from Magallanes to Calamba was renamed to Dr. Jose P. Rizal Highway, after the Philippine national hero Dr. José Rizal, who hailed from Laguna. This renaming was brought about by Batas Pambansa Blg. 264. In 1989, it was renamed to President Sergio Osmeña Sr. Highway, after the Commonwealth President Sergio Osmeña, by virtue of Republic Act No. 6760. The act was amended through Republic Act No. 7625 in 1992 to rename its portion in Laguna from kilometer 28.387 in San Pedro southwards to Dr. Jose P. Rizal Highway.

In 1995, the rehabilitation of the 13.43 km portion of SLEX from Magallanes to Alabang began as part of South Metro Manila Skyway Project Stage 1 that also includes the construction of the elevated Skyway above it up to Bicutan area. Thus, the Alabang Exit, which was also the expressway's former southern terminus, was designated as the concession boundary as PNCC decided to split SLEX into two concessions – the section from Magallanes to Alabang is made part of the Skyway System as the Skyway At-Grade, while the remaining section from Alabang southwards retains the South Luzon Expressway concession branding.

Expansion and rehabilitation
In 1996, PNCC entered into a joint venture with Hong Kong-based Hopewell Holdings to modernize and extend the expressway. The JV agreement also proposes the extension of the expressway by about 79 km from Calamba to Pagbilao, Quezon. However, Hopewell Crown Infrastructure Inc. (HCII) would later back out of the undertaking in 2003, thus Hopewell's deal with PNCC was also terminated in 2005.

On February 1, 2006, a new agreement was signed between Malaysia-based MTD Berhad and PNCC to rehabilitate, extend, and operate the expressway. Rehabilitation work started in May of that year, with heavy traffic brought by construction work. Prior to its rehabilitation, the South Luzon Expressway section from Alabang to Calamba was mostly an expressway with a grass median and two lanes per direction. The widening of the Alabang Viaduct from three to four lanes per direction was completed on November 11, 2008. During the construction of Skyway Stage 2 from 2009 to 2011, there were traffic disruptions on the Bicutan–Alabang section. The use of the sosrobahu method to build and position the bridge piers helped mitigate these disruptions. Rehabilitation work was finished in June 2009, resulting in the expansion of the Alabang–Santa Rosa section to eight lanes (four lanes per direction), similar to an American Interstate Highway, and the Santa Rosa–Calamba section to six lanes (three lanes per direction).

One year and six months after the Alabang Viaduct was rehabilitated and widened and eleven months after the completion of rehabilitation and modernization of the expressway's Alabang–Calamba section, the operation and maintenance of the expressway was transferred from the government-owned Philippine National Construction Corporation (PNCC) to South Luzon Tollways Corporation (SLTC) and Manila Toll Expressway Systems (MATES) on May 2, 2010.

The expressway became connected with STAR Tollway when construction works of Toll Road 3 project reached Santo Tomas Exit in 2009, making the exit the southern terminus of the expressway since then. Toll Road 3, also known as the SLEX-STAR Tollway link, was then inaugurated on June 15, 2010 by President Gloria Macapagal Arroyo and opened to the public six months later on December 15, 2010 during the administration of her successor Benigno Aquino III, with the name Alabang–Calamba–Santo Tomas Expressway (ACTEX).

MTD relinquished its stake in operating and maintaining SLEX to San Miguel Corporation (SMC) in January 2012. To decongest traffic, the SLEX Elevated Extension, originally known as Skyway Extension project, was constructed along the shoulder of the expressway in Muntinlupa from 2019 to 2021 and has connected the expressway's segment south of the Alabang Viaduct to Skyway Stage 2.

In December 2022, the Seamless Southern Tollways project was implemented on SLEX, MCX, Skyway, and STAR Tollway to simplify the toll collection process to a single payment upon exit. Additional toll plazas were built at interchanges from Canlubang to Santo Tomas, and the Calamba and Ayala Greenfield Estates toll plazas were converted into pass-through lanes. In 2023, an expansion project began to widen the expressway's southern segment below Alabang to six (2x6) lanes per direction, necessitating the felling of 8,766 trees along the route. Completion of the project is targeted for December 2024.

Toll Road 4


The South Luzon Expressway Toll Road 4, also referred to as Toll Road 4 (TR4), is a 66.74 km extension of South Luzon Expressway from Calamba (near its boundary with Santo Tomas, Batangas) to Lucena. Construction is divided into five segments, with one additional extension to Mayao in Lucena on the revised project outline. The extension project is implemented by the Toll Regulatory Board and will be operated by the SMC SLEX, Inc. (formerly South Luzon Tollway Corporation). The extension would decongest the existing national road between Santo Tomas and Lucena, and provide a modern alternate route for travellers from Quezon to the Bicol Region. Right-of-way acquisition is ongoing as of 2019, and the groundbreaking ceremony was held on March 26, 2019, alongside the beginning of construction. Right of way has been secured for the initial three segments from Calamba to Tiaong, with ongoing efforts to acquire land for the remaining stretch up to Lucena. The expressway's starting point has been relocated near the Ayala Greenfield Golf Course after several alignment adjustments prompted by right-of-way challenges. This section is designed initially with two lanes per direction, with potential for future expansion to 3–4 lanes.

The expressway is expected to partially open in 2025.

Toll Road 5
The South Luzon Expressway Toll Road 5, also referred to as Toll Road 5 (TR5), will be the extension of South Luzon Expressway from Mayao, Lucena to the vicinity of Port of Matnog in Matnog, Sorsogon. The total length of the extension would be approximately 417 km. It will be four-lane divided toll road with 28 interchanges and eight segments. It aims to decongest Andaya Highway and Pan-Philippine Highway, cut travel time from Manila to Naga by two to three hours, and to Matnog by six hours.

On June 29, 2020, the Toll Regulatory Board issued a resolution to declare this project a Toll Road upon the request of, and based on the proposal submitted by the joint venture (JV) of the Philippine National Construction Corporation (PNCC) and San Miguel Holdings Corporation (SMHC). On August 25, 2020, San Miguel Corporation thru South Luzon Toll Road 5 Expressway Inc. announced they will invest this project alongside the Pasig River Expressway with a cost of ₱122 billion in order to boost the economy in Luzon. The original plan for the expressway's extension was the Quezon-Bicol Expressway (QBEX or QUBEX), which was supposed to be an extension of the SLEX from Pagbilao to San Fernando, Camarines Sur. The 2017 proposal would have been a public-private partnership (PPP), with a total length of 180 km, and the 2019 proposal, which would have been 220 km, was supposed to be funded through the General Appropriations Act (GAA). However, the proposal was removed from the priority projects list in 2022.

On June 3, 2022, the Department of Transportation and San Miguel Corporation signed a Supplemental Toll Operations Agreement (STOA) for SLEX Toll Road 5 which was approved by then President Rodrigo Duterte 24 days later.

Other future plans
Other planned expansion projects in the SMC–PNCC joint venture pipeline with connections to either SLEX and the Skyway system include: 1. the San Pedro–C6 Laguna Lake Road that will link SLEX from San Pedro, Laguna to C-6 in Taguig;

2. Skyway Stage 8 or Tanauan–Tagaytay Expressway, a 29 km toll road;

3. Skyway Stage 7 that will connect Taguig to Commonwealth Avenue in Quezon City;

4. Buendia Interchange and Ramp Extension to Macapagal Boulevard.

Toll
Previously employing closed and barrier toll systems, the South Luzon Expressway fully employs a closed road system, wherein the toll fee is charged based on vehicle class and the kilometers travelled from the entry to exit point. The expressway's toll system is integrated with the South Metro Manila Skyway Project and Muntinlupa–Cavite Expressway (MCX).

Toll collection is done upon exit at either SLEX, STAR Tollway, or MCX. or at Skyway Main toll plaza in Muntinlupa, as part of San Miguel Corporation's Seamless Southern Tollways program. Access between two of the three exits on the Canlubang–Calamba segment and on the northernmost segment between Magallanes and Sales interchanges remain toll-free.

The expressway fully implements an electronic toll collection (ETC) system, the Autosweep RFID, using RFID technology, and the system formerly used "E-Pass", which uses transponder technology. The ETC system is shared by the Skyway, STAR Tollway, NAIAX, MCX and TPLEX. Cash payments are still accepted although ETC is currently being maximized.

The toll rates by vehicle class are as follows:

Service areas
The South Luzon Expressway currently has nine service areas, with four on the northbound and five on the southbound. All existing service areas occupy large land areas and have restaurants and retail space. The service areas also provide ETC reloading for Autosweep RFID users.

Lay-bys
The South Luzon Expressway also has lay-bys, or emergency parking areas where motorists can stop for safety checks on their vehicles and other emergencies.

Toll Road 4
