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 the interchange with the Pan-Philippine Highway and the South Luzon Expressway in Santo Tomas 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 in 2009, the South Luzon Expressway was connected to the STAR Tollway when construction works of the former's Toll Road 3 project reached Sto. Tomas Exit, further shortening travel time between Manila and Batangas.