In 2008, City Council approved the Concept Plan for the Capital Line South from Century Park to the south city limit (Allard/Desrochers). The Concept Plan confirmed the LRT corridor (route) and alignment (where the tracks will be within the corridor).

In 2010, the preliminary design for Phase 1 of Capital Line South between Century Park and Ellerslie Road was completed.

In September 2016, the federal government provided Public Transit Infrastructure Funds to support further development of the LRT Network Plan by the City of Edmonton.

In 2017, additional preliminary engineering from Century Park to Ellerslie Road was started to review and refresh the preliminary design, bring the project up to current standards and reflect the principles of Urban LRT.