4th Avenue Flyover Rehabilitation

About the project

The 4th Avenue flyover was built in 1982. This flyover carries two lanes of traffic towards 3rd Street S.E. As one of the main routes into downtown, the overall structure spans 430-meters crossing over the Bow River.

We plan to improve this flyover. Construction is likely to start in 2024, pending all necessary provincial and federal permits and approvals. Ongoing regular maintenance together with timely major improvements are important to keep bridges/flyovers safe and reliable, while minimizing future costs. This work also helps to extend the service life of these structures.

Scope of work

The project scope of work includes:

  • rebuilding existing concrete barriers and adding lighting
  • replacing existing concrete paving overlay with a polymer modified asphalt (PMA) overlay
  • replacing existing expansion joints, and other general concrete repairs across the structure


The project benefits include:

  • improving the condition of the flyover, including clarity by adding streetlights
  • extending the service life of the flyover by roughly 35 years
  • improving one critical link in the transportation network to help with Calgary's continued growth in the coming years

Project timeline

  • Design Completion: 2023
  • Tender to Market:
    October 2023
  • Construction Start: 
    Anticipated - spring 2024
  • Construction Completion: Anticipated - late fall 2025

Construction activities are dependent on several factors. Timelines may change due to inclement weather, complexity, supply chain, and/or other unexpected circumstances.

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Frequently asked questions (FAQs)

Why is 4th Avenue Flyover in need of repair?

Ongoing regular maintenance along with timely major rehabilitations are important to keep bridges/flyovers safe and reliable, while minimizing future costs and extending the service life of this type of structure. The project should greatly improve one critical link in the transportation network. These types of improvements help with Calgary's continued growth in the coming decades.


Estimated Budget: $12.5 million

This information has no legal status and cannot be used as an official interpretation of the various bylaws, codes and regulations currently in effect. The City of Calgary accepts no responsibility to persons relying solely on this information. Web pages are updated periodically. ​