It was one of several corridors considered for potential commuter rail passenger service or reuse by another transit mode by the Central Puget Sound Regional Transit Authority (now Sound Transit) in the 1990s.
Several corridors were examined by the Central Puget Sound Regional Transit Authority (now Sound Transit) during the 1990s for potential use as commuter rail passenger routes or to be repurposed for a different transit mode, and one of these corridors was selected for consideration.