23 Avenue NW is a major arterial road in south Edmonton. It runs through several neighbourhoods including Mill Woods and The Meadows, and commercial areas including South Edmonton Common, and Mill Woods Town Centre. In September 2011, construction completed of an interchange at the intersection with Calgary Trail & Gateway Boulevard (Highway 2); considered Edmonton's busiest intersection. Because Edmonton has adapted a quadrant system, the suffix NW is sometimes added to addresses, to avoid confusion with addresses south of Quadrant (1) Avenue.