Alternatives analysis and preliminary engineering work for the permanent station was authorized by the Sound Transit Board in 2005. The remaining funds from the 1996 ballot measure were used to complete design work and real estate acquisition, but construction would need to be funded separately. Construction of a permanent Tukwila station with up to 400 parking spaces was included in the Roads and Transit ballot measure, which was rejected by voters in November 2007. The permanent station was part of the standalone Sound Transit 2 measure, which was approved by voters in November 2008.
