Southern Tagalog Arterial Road

The Southern Tagalog Arterial Road (STAR), commonly known as the STAR Tollway and officially as the Apolinario Mabini Superhighway (AMS), is a two-to-four-lane, 41.9-kilometer (26.0 mi) controlled-access highway in the province of Batangas in the Philippines. It is operated by STAR Infrastructure Development Corporation (STAR–IDC). The expressway is part of Expressway 2 (E2) of the Philippine expressway network, alongside the South Luzon Expressway (SLEX) and portions of the Metro Manila Skyway.

The expressway begins at its boundary marker with SLEX in Santo Tomas, after the 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 also serves as a gateway to the provinces of Quezon, Camarines Sur, Albay, Sorsogon, Marinduque, Romblon, and Masbate, as well as the Visayas (with the last four accessible via Lucena and Matnog, respectively), through its exits at Santo Tomas, Ibaan, and Batangas/Balagtas.

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

With increasing traffic demand in the Batangas City–Bauan area and the Batangas Bay area, proposals have been put forward to extend the expressway and decongest existing routes. Two extensions have been proposed: one to Barangay Pinamucan in Batangas City, and another to the municipality of Bauan. The STAR Tollway is considered a separate expressway and is not alternatively named the South Superhighway (SSH), despite its connection to SLEX since 2008 and its role as the physical continuation of SLEX toward Batangas. It is also one of the four expressways serving as the airplanes' northbound airway of domestic flights leading to Ninoy Aquino International Airport (NAIA) coming from Visayas and Mindanao along with SLEX, Manila–Cavite Expressway (CAVITEX), and Metro Manila Skyway.