Dr. Arcadio Santos Avenue or Dr. Santos Avenue, formerly and still referred to as Sucat Road or Parañaque–Sucat Road, is the primary east–west thoroughfare in Parañaque, southern Metro Manila, Philippines. The avenue's western end is in Barangay San Dionisio as the continuation of Ninoy Aquino Avenue. Physically, Ninoy Aquino Avenue connects northbound to NAIA Road in Pasay which, in turn, continues west to Roxas Boulevard back in Parañaque, where it ends. Its eastern end is at the East Service Road, which runs parallel to South Luzon Expressway, in Barangay Sucat, Muntinlupa, where it becomes Meralco Road to service the rest of the route to Sucat railway station.