of highway

Fast and agile mobility

Completed in November 2013, the South East Stoney Trail project consisted of 27 new bridge structures and a new highway of approximately 25 km divided into 6 lanes.

SEST involved the construction of 25 km of motorway approximately 300 metres in width and with 6 lanes, three in each direction. In turn, the project had nine links, an elevated section in some portions and 27 structures.


The 27 structures that are part of the project had a total length of almost 2 kilometres, allowing the continuity of the motorway. Likewise, 11 very important junctions were built.


Conservation of the ecosystem was a key factor during all phases of construction, as was having no impact on the species in the area and the Athabasca River.

The new construction section had the following characteristics:

  • 25 km of 6 lanes (3+3).
  • Section width of almost 300 metres.
  • 27 structures (bridges and overpasses).


  • Location: Calgary, Alberta, Canada.
  • Contract type: Design, construction, financing, operation and maintenance (PPP).
  • Infrastructure: 25 kilometres of a 6-lane road, 3 km of pedestrian paths, 27 new bridge structures, including bridges over railway lines, and 11 intersections.
  • Year of project completion: 2013


Calgary residents will enjoy a great benefit as a result of this part of the bypass, not to mention the great impact that it will have on our transport and logistics industries to be able to move their products faster and more efficiently.



tonnes of reinforcement


million cubic metres of landfill


cubic metres of structural concrete


types of prefabricated beams


meters of steel beams intead of concreate




bridges structures

Tecnology and innovation

sustainable innovation

A number of innovative practices were used at the South East Stoney Trail Project to reduce the carbon footprint of the road construction and increase the sustainability of new road infrastructure. 

For example, all earth-moving material will be sourced on site, with a total of 12.4 million m3 of excavation to be used as landfill. In addition, existing junctions will become grade-separated interchanges without signals, which will increase the free flow of traffic by significantly reducing engine idling, especially in heavy diesel lorries. Our sustainable construction practices reduce the movement of goods to and from the site, improving efficiency, reducing transportation, fuel costs and emissions, and ultimately providing a more economical solution.

The technical complexity of the project is due to:

  • Planning and coordination for the scale of earthwork and paving involved.
  • Optimize design and construction activities.
  • Work in sensitive saline wetlands and within environmental schedule restriction windows.
  • Work safely on and around existing roads.
  • Operate and maintain the existing road during construction work.

Other projects of ACCIONA

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