Tacoma Link Liberty NXT light rail vehicle ready for delivery
https://www.railwaygazette.com/light-rail-and-tram/tacoma-link-liberty-nxt-light-rail-vehicle-ready-for-delivery/61235.article
Extension of the existing Tacoma Link is often taken up. But, I think more lines will be needed in downtown area of Seattle rather than building new rails. For example, there is no rail connecting East-West direction in the city.