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Macleod Trail / 162 Avenue S Interchange


Project update - January 28, 2019

Canada's first Diverging Diamond Interchange (DDI) was officially opened in the summer of 2017 at Macleod Trail and 162 Avenue in south Calgary.

View the video of the special event to celebrate the interchange opening.

In 2019, the final major element of the project will take place when crews complete top-lift paving on the surface of interchange roadway.


About the project

The interchange at Macleod Trail and 162 Avenue S. is an integral part of The City's overall transportation network, helping to enhance Macleod Trail as a free-flow gateway to the city from the provincial highway network. Construction of the interchange enhances mobility for commuters, cyclists and pedestrians while accommodating access to surrounding businesses and services.

After completing an analysis of the traffic flow at the intersection and evaluating several designs, it was determined that the Diverging Diamond Interchange (DDI) was the most appropriate layout for an interchange at that location. This is the first DDI to be constructed in Canada.

This project includes:

The project was coordinated with Provincial plans for the Southwest Calgary Ring Road (SWCRR).

Project budget

$78 million


When top-lift paving takes place, there will be minor lane closures to allow crews to complete the work.


Stakeholder communication and engagement has always been an important component of the Macleod Trail/162 Avenue Interchange planning process.

A total of four public information sessions were held related to this project. In​ addition, two special sessions for businesses in-and-around the interchange took place in April 2015 and March 2016.

Related documents


Project timeline

  • Fall 2015: Completion of phase 1 construction
  • Early 2016 – Fall 2016: Construction of first two bridge/overpass structures
  • Fall 2016: Begin phase 2 of detour construction
  • Winter 2016 – Fall 2017: Construction of third bridge/overpass structure and associated roadworks
  • Summer 2017: Staged opening of interchange
  • Late 2017: Completion of project
  • Summer 2019: Top-lift paving on interchange roadway

How to use the DDI

Animation video of how to use the new DDI interchange.

Other videos

Macleod 162 Ave opening event photos

Photo Gallery - Unclassified