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Macleod Trail / 162 Avenue S Interchange

Design plans Temporary Interchange How DDI operates FAQ document

Construction update – November 30, 2017

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.

There will be temporary lane closures in December as the project moves toward full completion.

View the temporary restrictions associated with the interchange opening.

When using the new interchange, motorists are reminded that left turns from 162 Avenue to Shawville Blvd. are still possible when travelling westbound across Macleod Trail from Sun Valley Blvd. Drivers simply enter the dedicated lane with the overhead sign indicating Shawville Blvd. South. However, the dividing median for the left turn bay has been extended to prevent cars that exit from southbound Macleod Trail from crossing three lanes into the left turn bay. This new, permanent change, improves safety for all motorists by reducing the amount of weaving and lane-changing especially during rush hour.

Also, motorists on southbound Macleod Trail now have two options for accessing the Shawnessy shopping centre to the south. First, you can continue west on 162 Avenue and take the next left turn at Shawville Way. Second, the City has constructed a new dedicated access ramp from southbound Macleod Trail into the Shawnessy shopping centre. All you need to do is continue past the 162 Avenue exit and then take the next right under the overpass structure. Once you take the Shopping Centre exit, the lane will direct you into the south part of the shopping centre without having to go through any traffic lights.

See what the completed Diverging Diamond Interchange will look like. Check out the videos on this page on how to use this DDI.

About the project

The interchange at Macleod Trail and 162 Avenue S. is will be 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 will 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 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

Project budget

$78 million


Sunday, August 13 marked another milestone in the construction of the Macleod Trail/162 Avenue Interchange as Canada's first Diverging Diamond Interchange (DDI) was officially opened and traffic is now flowing on the new DDI layout.

Additional closures will take place as the project moves to full completion.

View the temporary restrictions associated with the interchange opening.


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 have been held related to this project. In addition, two special sessions for businesses in-and-around the future interchange took place in April 2015 and March 2016.

Please fill out the online form if you have questions or require more information.

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