# With the long-awaited inaugural "live wire" test successful, Sound Transit will continue tests on the Lake Washington bridge for another 10 to 12 weeks, followed by several months of running empty trains. Monday's test was a crucial milestone to stay on track for a full 2 Line grand opening next spring.
Yep, we have 3 of them now in Washington State, 2 of which are here in Seattle. Essentially giant pontoons tethered to the lake bed. Check out this video if you want to know more: https://www.youtube.com/watch?v=7lsxf0OnNwc