The Hanger Lane gyratory is a large, complex roundabout system at the junction of Western Avenue (A40), the North Circular (A406) and Hanger Lane in the borough of Ealing in west London. It covers an area of about 30,000 square metres (320,000 sq ft). At rush hour it carries nearly 10,000 vehicles per hour. An above-ground section of the London Underground Central line passes under the roundabout.