Crowchild Trail is a major expressway in western Calgary, Alberta. The segment from the 12 Mile Coulee Road at the edge of the city to 16 Avenue NW is designated as Highway 1A by Alberta Transportation. The road is a critical north-south link in West Calgary for both downtown bound traffic and travel between the two quadrants of the city it passes through. Although planned to be one single freeway from Glenmore Trail to the city limits, the route is currently divided by a section of slow moving arterial road with four signalized intersections between 24 Avenue and Memorial Drive. This causes the freeway in the northwest to separated from the freeway south of the Bow River. Filling the gap and making the whole route a minimum six lane freeway is currently planned for construction beyond 2027.

A limited-access road, known by various terms worldwide, including limited-access highway, dual-carriageway, expressway, and partial controlled-access highway, is a highway or arterial road for high-speed traffic which has many or most characteristics of a controlled-access highway, including limited or no access to adjacent property, some degree of separation of opposing traffic flow, use of grade separated interchanges to some extent, prohibition of slow modes of transport, such as bicycles, horse-drawn vehicles or ridden horses, or self-propelled agricultural machines; and very few or no intersecting cross-streets or level crossings. The degree of isolation from local traffic allowed varies between countries and regions. The precise definition of these terms varies by jurisdiction.