Calamba–Pagsanjan Road

It starts from the intersection of the Old National Highway (Manila South Road) at the Calamba Crossing in Calamba. It then follows a route that circumscribes Laguna de Bay, passing through the municipalities of Los Baños, Bay, Calauan, Victoria, Pila, Santa Cruz, the capital of Laguna, and terminates in Pagsanjan, all in Laguna. Alternative names The highway is also known as National Highway or Manila South Road (Extension) for being such. It forms part of the Calamba to Pagsanjan segment of the Calamba–Sta. Cruz–Famy Junction Road. At the town proper of Pagsanjan, it is locally known as J.P. Rizal Street or simply as Rizal Street. ==History==

Most of the highway existed back to the American colonial era as part of Highway 21 that linked the city of Manila to the provinces of Rizal and Laguna by circumscribing Laguna de Bay. The Calamba–Calauan segment of the highway was part of the Manila South Road system prior to the completion of the present-day section of the Pan-Philippine Highway from Santo Tomas, Batangas to San Pablo, Laguna during that era. The entire road formed part of what was known as the Calamba–Santa Cruz–Rizal Boundary Road. Roads bypassing the poblacions of Santa Cruz, Calauan, and Bay were later built to form the present-day highway alignment. As of 2026, the Department of Public Works and Highways (DPWH) revised the western terminus of the Calamba–Pagsanjan Road from its junction with J.P. Rizal Street and Real Road (officially known as Rizal Shrine Road) to its intersection with Manila South Road, both at the Calamba Crossing, incorporating a segment of the latter into its alignment. == Intersections ==