South Luzon Expressway

Also known as: SLEX · South Superhighway (historical) · South Luzon Tollway · R-3 / AH26 (route designations)

Definition

The South Luzon Expressway (SLEX), historically the South Superhighway, is a network of controlled-access toll expressways extending south from Metro Manila through the Calabarzon region. The mainline runs from Magallanes Interchange in Makati to Santo Tomas, Batangas, continuing as the SLEX STAR Tollway toward Batangas City. Operated by South Luzon Tollways Corporation (a San Miguel Holdings subsidiary), it is the principal corridor between Metro Manila and southern Luzon.

Identities

Source	Identifier
Wikipedia	South Luzon Expressway
Wikidata	Q168982
DBpedia	dbr:South_Luzon_Expressway

Also Known As

SLEX
South Superhighway (historical)
South Luzon Tollway
R-3 / AH26 (route designations)

Examples and Analogies

SLEX serves the southern corridor as NLEX serves the northern — a critical controlled-access spine for commuters, freight, and tourism. Its interface with the Skyway System parallels how London’s orbital motorways connect suburban growth to the urban core.

Usage Scenarios

Commuting between Metro Manila and Calabarzon provinces
Freight to and from the Port of Batangas and industrial estates
Tourist travel to Tagaytay, Batangas beaches, and nearby destinations
Access to CALAX, MCX, and SLEX STAR sub-corridors

Strategies

Recent strategies include continuous widening, new interchanges, RFID cashless tolling via Autosweep, and integration with newer expressways (MCX, CALAX, Skyway System) forming an integrated southern toll network supporting regional growth.

Security and Safety Measures

SLEX features 24/7 patrols, traffic management centers, emergency call boxes, roadside cameras, and rapid incident response. Speed enforcement, truck weight checks, and bans on pedestrians and small motorcycles maintain safety; rest areas provide amenities.

Historical Context

Construction of the then-South Superhighway began in the late 1960s alongside NLEX. Progressively extended and rehabilitated under private concession in the 2000s, integration with the STAR Tollway created a continuous high-standard link from Metro Manila to Batangas City.

Challenges and Controversies

Recurring issues include congestion at Alabang and Susana Heights interchanges, periodic toll rate disputes, and the long-running debate over Skyway Stage 3 alignment. Flash floods and rapid suburban growth drive demand for new lanes.