Magallanes Interchange

The Magallanes Interchange is a four-level partial turbine interchange in Makati, Metro Manila, Philippines. It serves as the junction between the Osmeña Highway, Epifanio de los Santos Avenue (EDSA), and South Luzon Expressway (SLEX), intersecting with inner streets and Chino Roces Avenue as well. It is also an interchange between the two train lines of Metro Manila, the MRT-3, which is over EDSA, and the PNR Metro Commuter Line beside Osmeña Highway and SLEX. It is currently one of the busiest intersections in Metro Manila.

History
After the proposal of President Ferdinand Marcos in 1969 of the creation of 6 Circumferential Roads, EDSA, which used to end at Taft Avenue (Manila South Road), was extended to Roxas Boulevard. Thus, an interchange was required to be built between the then newly built Manila South Diversion Road and EDSA. It opened in 1975 officially as the Manila South Diversion Road–EDSA Interchange.

In 1993, more lighting facilities were installed at the vicinity of the interchange by virtue of an ordinance ratified by the Makati local government. The interchange underwent redevelopment and beautification also by the Makati local government in 2005, thus opening a park at the interchange's ground level.

Traffic management measures
The interchange's elevated left-turn portion from Osmena Highway southbound onto EDSA northbound is indefinitely closed as a precautionary measure against traffic congestion and accidents in the area. In addition, the portion of Chino Roces Avenue passing beneath the interchange's flyovers along EDSA is designated as one-way northbound, with a vertical clearance of 2.70 m. Southbound traffic for that section of Chino Roces is redirected to EDSA's at-grade service road.

Feared collapse and rehabilitation efforts
The interchange was poorly designed as it had prior damages on carriageway, particularly cracks and disintegration of concrete, guard rails, and steel expansion joints. Having been repaired in the 1980s, it was one of the most priority structures in Metro Manila that needed retrofitting.

In November 2010, several pipe leaks were discovered under the interchange, leading to the closure of its outer lanes by the Metropolitan Manila Development Authority due to fears of compromised structural integrity; it was reopened in 2011.

The strengthening works at the interchange was completed in 2017. The interchange's flyover is set for rehabilitation starting October 2024.