Flanders Avenue Interchange

Calgary, AB

The Flanders Avenue Interchange on Crowchild Trail stands at the crossroads of Calgary’s history, serving as the front entrance to the former Currie Barracks at Canadian Forces Base Calgary since it opened in the mid-20th century. Following closure of the base in the late 1990s, the surrounding lands have been redeveloped into some of Calgary’s most innovative and sought-after neighbourhoods.

Innovative Design

To improve access and comfort for all modes of transportation, ISL was engaged to lead the planning for upgrades to the Flanders Avenue Interchange. Through a comprehensive technical evaluation and community engagement process, ISL developed an innovative interchange design that fit the urban context, opened up new access opportunities and accommodated future growth in the surrounding area.

A First for Alberta

As Alberta’s first interchange with multi-lane roundabouts, it uses a unique series of three roundabouts to connect seven streets through a single overpass location.


The interchange was delivered using a unique Design-Build procurement model, with joint funding by Canada Lands Company and The City of Calgary.

Cooperative Approach

ISL acted as Owner’s Engineer for the D-B process, responsible for preparation of procurement documents and administration of the pursuit process that ultimately awarded the work to a team led by Westpro Infrastructure. ISL collaborated with the Engineer of Record through design and construction of the interchange to bring ISL’s functional design to life and provided audit service throughout the construction process. The cooperative approach of the consulting team exemplifies industry collaboration and delivered excellence in transportation infrastructure and project management.

Official Opening

The revitalized interchange officially opened to traffic on October 31, 2016, forming a gateway into the emerging communities and enhancing mobility for generations of Calgarians.

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