This massive project — the largest in the history of the City of Edmonton at the time — saw Edmonton’s most accident-prone intersection transformed into an interchange that improved intersection safety, enhanced free-flow traffic and can accommodate Edmonton’s future population and traffic growth.
The project consisted of a split diamond interchange with 23 Avenue overpassing the existing Gateway Boulevard/Calgary Trail roadways and the CPR railway (four bridges in total). There is also a partial interchange at 19 Avenue to provide a second access from Gateway Boulevard/Calgary Trail to the South Edmonton Common commercial development (the southbound connection from Calgary Trail to 19 Avenue is grade separated).
Extensive retaining wall systems were used to avoid encroachment on the existing adjacent land uses, including residential properties, commercial properties, industrial yards and railway lands. Numerous pipeline relocations were required to eliminate conflicts between the interchange and a major pipeline corridor (12 pipelines).