Commonwealth Avenue, Quezon City

Commonwealth Avenue
Don Mariano Marcos Avenue
Commonwealth Avenue near the University of the Philippines Diliman
Route information
Length:	12.4 km (7.7 mi)
Component highways:	R-7 R-7 N170
Major junctions
South end:	Quezon Memorial Circle, Elliptical Road, Quezon City
	University Avenue, Diliman, Quezon City Central Avenue, Quezon City Tandang Sora Avenue (C-5), Quezon City Luzon Avenue, Quezon City Holy Spirit Drive, Quezon City Batasan (IBP) Road, Quezon City Regalado Avenue, Quezon City
North end:	Quirino Highway, Quezon City
Highway system
Highways | Expressways

Commonwealth Avenue (Filipino: Abenida Komonwelt), formerly known as Don Mariano Marcos Avenue (Tagalog: Abenida Don Mariano Marcos), named after the father of President Ferdinand Marcos, is a 12.4 km (7.7 mi) highway located in Quezon City, Philippines, which spans from 6 to 18 lanes and is the widest in the Philippines. It is one of the major roads in Metro Manila and is designated as part of Radial Road 7 (R-7) of the older Manila arterial road system and N170 of the Department of Public Works and Highways national highway system.

Commonwealth Avenue starts from the Quezon Memorial Circle inside the Elliptical Road, and it passes through the areas of Philcoa, Tandang Sora, Balara, Batasan Hills and ends at Quirino Highway in the Novaliches area.

The Commonwealth Avenue is divided to two portions, the 6–8-lane Fairview Avenue and the 18-lane Don Mariano Marcos Avenue. The Don Mariano Avenue was constructed in the late-1960s as a two-lane highway to offer a route towards the Batasang Pambansa Complex. Quezon City was then the capital of the Philippines, and embassies were to be put up on the stretch of highway. Because the country's capital was moved back to Manila in 1976, other establishments were put up instead. The Don Mariano Marcos Avenue was later extended from the Elliptical Road to Calle Espana (now known as Espana Boulevard). The Don Mariano Marcos Avenue was later renamed into two parts, the Commonwealth Avenue and Quezon Avenue. Later Commonwealth Avenue regained the 8-lane Fairview Avenue, which ends in the Jordan Plains Subdivision in Novaliches.