Las Piñas City will soon be served by the LRT-1 (via Manuyo Uno Station and Las Piñas Station).
Las Piñas City is accessible through these major roads:
Carlos P. Garcia Avenue (C-5 Road Extension)
Daang Hari Road (Las Piñas, Muntinlupa, Cavite, Laguna Link Road)
J. Aguilar Avenue
Marcos Alvarez Avenue
Padre Diego Cera Avenue (Quirino Avenue)
Daang Reyna (Connected to Daang Hari Road)
The city is bisected by Real Street (Spanish for Royal), also known as the Alabang–Zapote Road. It forms part of the 3,517 km (2,185 mi) Maharlika Highway or Pan-Philippine Highway, a network of roads, bridges, and ferry services that connect the islands of Luzon, Samar, Leyte, and Mindanao. The Alabang–Zapote Road connects the South Luzon Expressway, which passes through Muntinlupa in the east, to Coastal Road along the eastern shore of Manila Bay.
Coastal Road is a major tollway which runs the southern length of Metro Manila’s shoreline with Manila Bay. It is an important artery for people commuting between Las Piñas and Cavite to Manila.
In 2004, the Daang Hari (Tagalog for King’s Way) motorway was completed along the Las Piñas-Muntinlupa border. The road provides an alternative access route to the inner areas of both cities, including the neighbouring towns of Bacoor, Cavite and San Pedro, Laguna. Daang Hari is also popular route for cyclists, especially on weekends.
There are several bus lines linking Las Piñas and Manila. Bus services that operates in Las Piñas includes Tas Trans Corp./Bensan Trans, Reinalyn Bus Lines, WLH Trans/WLLH Liner, MJ Sunville Transport. There are also several FX vans that goes from Manila to Las Piñas and they are usually parked in front of the Manila Central Post Office. Various jeepney routes also ply the roads between the city and neighboring cities and towns in Parañaque, Muntinlupa & Cavite .
You can get a rough idea about Las Piñas City here.