The Southern Tagalog Arterial Road (also known as the STAR Tollway or CALABARZON Expressway as town folks calls the tollway) is a four-lane 22 km expressway in the Philippines. The STAR Tollway is operated by STAR Infrastructure Development Corporation (STAR - IDC) and later be operated by the South Luzon Tollways Corporation (SLTC), a joint venture of the Philippine National Construction Corporation and the MTD Manila Expressway Corporation (MMEC) (a subsidiary of MTD Capital of Malaysia), after the South Luzon Expressway Upgrading and Rehabilitation Project is completed. It runs from Santo Tomas to Lipa City in the province of Batangas. The expressway is part of the South Luzon Expressway, though it is not yet connected with SLEx.
On January 19, 2008, President Gloria Macapagal-Arroyo inspected the P1.5-billion STAR, Stage II-Phase 1 connecting Lipa (19.74 kilometers) and Batangas, and the Southern Luzon Expressway (SLEX) road widening, expansion and the STAR toll way development projects in Batangas. Undersecretary Ramon P. Aquino stated "the STAR project, which is part of the Luzon Urban Beltway infrastructure program, would be completed in March 2008 and would be open to traffic on the 30th day of that month; the project which was now 73% accomplished, started in January 2006 and has 26 months to finish. The project once completer is said to reduce travel time between Lipa City and Batangas City by 40 to 45 minutes.the STAR Tollway Project II comprises two phases, where Phase I covers the two-lane single carriageway with 3.65-meter lane width southbound road for the 19.74-kilometer concrete stretch from Lipa City to Batangas City."
The expressway starts at the intersection with the Maharlika Highway or formerly known as the Manila South Road (MSR) in Santo Tomas and runs southward, west of the Maharlika Highway. It passes through areas under the jurisdiction of the Municipality of Malvar and Tanauan City, then rejoins the Maharlika Highway with an interchange in Lipa City. It will extend until Bauan, Batangas.