Commonwealth Avenue (Quezon City)

R-7
Commonwealth Avenue
; R-7; Commonwealth Avenue
Don Mariano Marcos Avenue
	Map of Commonwealth Avenue in Metro Manila
	Commonwealth Avenue-Technohub, viewed from the MRT 7 rail tracks
Route information
Length	12.712 km (7.899 mi)
Existed	1960s–present
Component; highways	R-7 R-7; N170;
Major junctions
South end	N170 (Elliptical Road)
	N175 (University Avenue); N129 (Tandang Sora Avenue);
North end	N129 (Quirino Highway)
Location
Country	Philippines
Major cities	Quezon City
Highway system
	Roads in the Philippines; Highways; Expressways List; ;

Commonwealth Avenue, formerly known as Don Mariano Marcos Avenue, is a 12.4-kilometer (7.7 mi) highway located in Quezon City, Philippines. It spans six to eighteen lanes, making it the widest road in the country. The avenue 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 National Route 170 (N170) of the Philippine highway network.

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

Being located in Quezon City, which is among several cities in Metro Manila with a high incidence of road accidents, the avenue has a high accident rate, particularly due to overspeeding, earning it the nickname "Killer Highway". A speed limit of 60 kilometers per hour (37 mph) is being enforced to reduce accidents on the avenue.