This became part of the original Blue Line, which failed to find support in 2014 and was shelved.

[3] In 2018, CapMetro announced a new long-range planning project entitled Project Connect that outlines several major transit corridors consisting of commuter rail, light rail, and bus rapid transit.

[4] The Blue Line corridor will include a transit pathway for a light rail or bus rapid transit line running on the west side of Downtown Austin to Austin–Bergstrom International Airport in southeast Austin.

[5] The line was included as part of the Project Connect referendum during the 2020 election.

[3][6] A new bridge over Lady Bird Lake is planned to carry the line into the Downtown Transit Tunnel.