Southern Tagalog Arterial Road

The Southern Tagalog Arterial Road (STAR), commonly known as the STAR Tollway, and formerly the South Luzon Expressway Extension Project (SLEEP) during its early stages, is a two-to-four-lane 41.9-kilometer (26.0 mi) controlled-access toll expressway in the province of Batangas in the Philippines. It is operated by STAR Infrastructure Development Corporation (STAR – IDC). The expressway is signed as E2 of the Philippine expressway network, alongside the South Luzon Expressway and unspecified portions of the Skyway. The expressway starts at its boundary signage with South Luzon Expressway in Santo Tomas after LISP Underpass and before the namesake southbound exit and entrance, and runs southward, near Diversion Road, to Batangas City. It passes through the cities and municipalities of Tanauan, Malvar, Lipa, San Jose, and Ibaan.

The expressway was opened in 2000, with its first segment built between Santo Tomas and Lipa. In 2008, it was extended toward Batangas City and on the second quarter of that same year, the South Luzon Expressway was connected to the STAR Tollway when construction works of the former's Toll Road 3 project reached the expressway, further shortening travel time between Manila and Batangas.

With increasing traffic demand in the Batangas City – Bauan area and the Batangas Bay area, proposals to extend the expressway are laid out to decongest the existing routes through those areas. Two projects are proposed to extend the expressway to barangay Pinamucan, within Batangas City, and to the municipality of Bauan. The STAR Tollway is considered as a separate expressway and is not named alternatively as South Superhighway (SSH) despite being connected with SLEX since 2008.