Ortigas Avenue is a 15.5 km (9.6 mi) highway running from eastern Metro Manila to western Rizal in the Philippines. It is one of the busiest highways in Metro Manila, serving as the main thoroughfare of the metro's east–west corridor, catering mainly to the traffic to and from Rizal. The western terminus of the highway is at the boundary of San Juan and Quezon City. The highway then traverses through Ortigas Center and along the cities of Mandaluyong, Quezon City, and Pasig, followed by the municipalities of Cainta and Taytay, and finally ending in the city of Antipolo.