# Osmeña Highway

The President Sergio Osmeña Sr. Highway (often shortened as Osmeña Highway), also known as the South Superhighway, is a 4.595-kilometer (2.855 mi) major highway that links Quirino Avenue in Paco, Manila to Epifanio de los Santos Avenue (EDSA) and South Luzon Expressway (SLEX) at the Magallanes Interchange in Makati.
The highway is designated as a component of National Route 145 (N145) of the Philippine highway network and Radial Road 3 (R-3) of Metro Manila's arterial road network.

## Etymology

President Sergio Osmeña Sr. Highway (Osmeña Highway) is named after Sergio Osmeña, the fourth President of the Philippines. Since 1989, its name has also been alternatively applied to South Luzon Expressway's section from Magallanes Interchange to kilometer 28.387 in San Pedro, Laguna. It was also used further south in Laguna up to Calamba until 1992 when this segment was renamed after Dr. José Rizal by virtue of Republic Act No. 7625.
South Superhighway is the older name of the highway and is currently more widely used alternatively. It is also the alternative name of the tolled South Luzon Expressway. It was also known as and forms part of Manila South Diversion Road or simply South Diversion Road.

## Route description

The highway starts at a traffic light intersection with Quirino Avenue in Paco, Manila. It traverses the districts of Malate and San Andres Bukid and crosses San Andres Street, Ocampo Street, and Zobel Roxas Street. It then enters the city of Makati and climbs over to pass above Gil Puyat Avenue through the Osmeña Flyover (also known as Buendia Flyover), with service roads to serve that avenue and several side streets. The first stage of the elevated Skyway starts on the ramps past the flyover. Osmeña Highway crosses Arnaiz Avenue and soon crosses over EDSA at the Magallanes Interchange, where the highway continues south as the South Luzon Expressway. Most of it parallels the PNR Metro South Commuter Line and runs under Skyway.
The Paco–Muntinlupa segment of the Sucat–Paco–Araneta–Balintawak transmission line of National Grid Corporation of the Philippines (NGCP) uses the highway right of way from Quirino Avenue to Magallanes Interchange.

### Road maintenance

The entire highway is classified as a national secondary road. It is maintained by the Department of Public Works and Highways (DPWH) through the South Manila District Engineering Office and Metro Manila 2nd District Engineering Office in Manila and Makati, respectively. The Metropolitan Manila Development Authority (MMDA) also has jurisdiction over both the tolled and non-tolled segments and maintains motorcycle lanes up to Sales Interchange (Nichols). It also handles traffic management alongside the local governments of Manila and Makati.
Apparently, Skyway Operations and Maintenance Corporation (SOMCO), the operator of Skyway and a subsidiary of San Miguel Corporation, wanted Osmeña Highway to be under its control, given that the highway runs below Skyway. SOMCO and SMC Tollways consider the highway's section from Buendia to Magallanes as part of Skyway At-Grade as it runs beneath Skyway Stage 1. However, it was stated that SOMCO and Citra Metro Manila Tollways Corporation (now SMC Skyway Corporation), the concession holder of Skyway Stage 1, do not have jurisdiction over toll-free roads, including Osmeña Highway.

## History

The highway was built from the 1950s to 1960s as part of the newer road connecting Manila and Southern Luzon, called Manila South Diversion Road (MSDR) or South Superhighway. It was built parallel to the Philippine National Railway's Batangas extension line and over the old Hernandez Street in San Andres, Manila. The flyover that crosses above Buendia Avenue, formerly known as the Buendia-MSDR Overpass Project, was built in 1979.
The highway was renamed in 1989 to President Sergio Osmeña Sr. Highway by virtue of Republic Act No. 6760. The center island of Osmeña Highway's section from Zobel Roxas to EDSA underwent repairs by the then-municipal government of Makati in 1994. The highway was also involved in the construction of Skyway Stage 1, built above its section south of Buendia, from 1995 to 1998. The Osmeña Flyover underwent repairs in 2011. The highway would once again become involved in another Skyway construction, this time Skyway Stage 3, built above its section north of Buendia as Stage 1's continuation, which commenced in 2014. With this, the Makati–Manila boundary marker on the highway was demolished in November 2014.

## Transportation

Osmeña Highway is accessed through jeepneys, taxis, and buses. Running parallel to the PNR Metro South Commuter Line, the highway is served by Philippine National Railways (PNR) stations, namely San Andres, Vito Cruz, Dela Rosa (replacing Buendia), Pasay Road, and EDSA (interchange to MRT Line 3 at Magallanes station). The line's operations have been suspended since March 27, 2024, to make way for the construction of the elevated North–South Commuter Railway tracks above it.

## Intersections

Intersections are numbered by kilometer posts, with Rizal Park in Manila designated as kilometer zero.
| Province | City/Municipality | km | mi | Destinations | Notes |
| Manila | Manila | 4.090 | 2.541 | N140 (Quirino Avenue) | Traffic light intersection. Northern terminus. |
| Manila | Manila | | | Skyway | Quirino Exit of Skyway; northbound entrance and pending future southbound exit |
| Manila | Manila | 4.150 | 2.579 | South Superhighway Bridge #1 over Estero de Paco | South Superhighway Bridge #1 over Estero de Paco |
| Manila | Manila | | | South Superhighway Bridge #2 over Estero de Tripa de Gallina | South Superhighway Bridge #2 over Estero de Tripa de Gallina |
| Manila | Manila | 4.650 | 2.889 | San Andres Street | Traffic light intersection; no left turn allowed on both sides. |
| Manila | Manila | | | Arellano Street | Southbound access only |
| Manila | Manila | | | Estrada Street | Southbound access only |
| Manila | Manila | 5.430 | 3.374 | Ocampo Street | Traffic light intersection; one-way street. No left turn allowed from northbound. |
| Manila – Makati boundary | Manila – Makati boundary | 5.490 | 3.411 | Zobel Roxas Street | Traffic light intersection; one-way street. |
| Makati | Makati | | | Skyway | Buendia (Zobel) Exit of Skyway; southbound entrance |
| Makati | Makati | | | Arellano Street | Southbound access only |
| Makati | Makati | | | Skyway | Buendia (Zobel) Exit of Skyway; northbound exit |
| Makati | Makati | 7.552 | 4.693 | Calatagan Bridge over Calatagan Creek | Calatagan Bridge over Calatagan Creek |
| Makati | Makati | | | North end of Osmeña Flyover | North end of Osmeña Flyover |
| Makati | Makati | | | Emilia Street, Malugay Street | Traffic light intersection; no entry to Osmeña Highway from Emilia Street |
| Makati | Makati | | | N190 (Buendia Avenue) | Traffic light intersection |
| Makati | Makati | | | Finlandia Street, Dela Rosa Street | Traffic light intersection; no left turn allowed from northbound |
| Makati | Makati | | | South end of Osmeña Flyover | South end of Osmeña Flyover |
| Makati | Makati | | | Faraday Street | Southbound access only |
| Makati | Makati | 6.750 | 4.194 | AH 26 (E2) (Skyway) | Buendia Exit of Skyway; southbound exit and northbound entrance |
| Makati | Makati | 7.320 | 4.548 | Arnaiz Avenue | Traffic light intersection; no left turn allowed from southbound |
| Makati | Makati | 7.800 | 4.847 | Don Bosco Street | Northbound access only |
| Makati | Makati | | | AH 26 (E2) (Skyway) | Don Bosco Exit of Skyway; northbound entrance |
| Makati | Makati | | | Makati Diversion Channel Bridge over Makati Diversion Channel | Makati Diversion Channel Bridge over Makati Diversion Channel |
| Makati | Makati | 8.710 | 5.412 | AH 26 (N1) (EDSA) | Magallanes Interchange (Southern terminus); continues south as AH 26 (E2) (SLEX) |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Incomplete access ||||||