Osmeña Highway

A street sign of Osmeña Highway in Manila

The Osmeña Highway starts at a traffic light intersection with Quirino Avenue in Paco, Manila.[2] It then crosses San Andres Street, Ocampo (Vito Cruz) Street, and Zobel Roxas Street, enters Makati and climbs over to pass above Gil Puyat Avenue through the Buendia Flyover, with service roads to serve that avenue and several side streets.[3] The first stage of Skyway starts on the ramps past Buendia Flyover.[4][5] Osmeña Highway crosses Arnaiz Avenue and soon crosses over EDSA at the Magallanes Interchange, where the South Luzon Expressway starts. Most of the highway parallels the PNR Metro South Commuter Line and runs under the Skyway elevated toll road.[6][7][8]

The part of Osmeña Highway north of Magallanes Interchange 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.[6][7] The Metropolitan Manila Development Authority (MMDA) has jurisdiction also of both the tolled and non-tolled segments, and maintains motorcycle lanes up to Sales Interchange (Nichols).[9][10]

Currently, Osmeña Highway also refers alternatively to the segment of South Luzon Expressway from Magallanes Interchange to Muntinlupa.[1] It was also applied further south to the province of Laguna until 1992.[11]

Osmeña Highway was originally built during the late 1960s as Manila South Diversion Road or South Superhighway from Manila to Alabang, Muntinlupa (then a municipality of Rizal). It served as newer roads used to travel from and to Manila.[12] The construction started in 1967 and was completed on December 16, 1969.

In 1976, the expressway was extended by another 29 kilometers (18 mi) from Alabang up to Calamba, Laguna. The project included the 850-meter-long (0.53 mi) viaduct which crosses over Alabang called Alabang Viaduct. This later on became the boundary when the Philippine National Construction Corporation decided to split the expressway into two concessions which renamed the Nichols to Alabang segment as the South Metro Manila Skyway System while the Alabang to Santo Tomas segment retained the South Luzon Expressway concession branding.[13] South Superhighway was renamed in 1989 to President Sergio Osmeña Sr. Highway, after former President Sergio Osmeña by virtue of Republic Act 6760.[1] The Act was amended in 1992 to rename its segment from kilometer 28.387 at San Pedro, Laguna southwards to Dr. Jose P. Rizal Highway. [11]

Osmeña Highway's intersection with Gil Puyat Avenue beneath Buendia Flyover and Skyway

Intersections are numbered by kilometer posts, with Rizal Park in Manila designated as kilometer zero. 

Province	City/Municipality	km	mi	Destinations	Notes
Manila		4.090	2.541	N140 (Quirino Avenue)	Traffic light intersection
				Skyway	Skyway Quirino Exit; northbound entrance only
		4.650	2.889	San Andres Street	Traffic light intersection. No left turn allowed from either directions.
		5.430	3.374	Pablo Ocampo Street	Traffic light intersection; one-way street
		5.490	3.411	Zobel Roxas Street	Traffic light intersection; one-way street
Makati				Skyway	Buendia Exit of Skyway Stage 3; northbound exit and southbound entrance
				North end of Buendia Flyover
				Emilia Street, Malugay Street	Traffic light intersection; no entry to Osmeña Highway from Emilia Street
				N190 (Buendia Avenue)	Traffic light intersection
				Finlandia Street, Dela Rosa Street	Traffic light intersection; no left turn allowed from northbound and no right turn allowed from southbound
				South end of Buendia Flyover
		6.750	4.194	E2 / AH26 (Skyway)	Skyway Buendia Exit; southbound exit and northbound entrance
		7.320	4.548	Arnaiz Avenue	Traffic light intersection; no right turn allowed from northbound and no left turn from southbound
		7.800	4.847	Don Bosco Street	Northbound access only; southbound access via U-turn slot under Magallanes Interchange
				E2 / AH26 (Skyway)	Skyway Don Bosco Exit; northbound entrance
		8.710	5.412	N1 / AH26 (EDSA)	Magallanes Interchange. Continues south as E2 / AH26 (South Luzon Expressway).
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Incomplete access