SMC SLEX Inc. is the concessionaire of the SLEX which currently spans 36.1 km from Alabang, Muntinlupa to Sto. Tomas, Batangas. The SLEX is one of the three major expressways that links Metro Manila to the key southern provinces of the Philippines, including CALABARZON. To the north of the SLEX is the Skyway System, and to the south is the Southern Tagalog Arterial Road ("STAR"). SLEX connects with Skyway System and STAR and is a key logistical backbone to the southern corridor of Metro Manila.