No, there's no date for it either as far as I'm aware, just "2025" (which it is now). According to articles as of 6 days ago they needed to do testing with trains or something, but didn't want to commit to a date. Apparently 2026 the world cup is coming here and that's part of why they want it now
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https://www.seattletimes.com/seattle-news/transportation/light-rail-in-redmond-just-expanded-whats-next-for-eastside-mass-transit/