Light rail over the I-90 floating bridge
As part of the East Link light rail extension, Sound Transit is doing something that’s never been done before – placing light rail on a floating bridge. To safely transition light rail vehicles from the I-90 land bridge to the floating bridge, engineers and designers had to consider a number of factors including six different ranges of motion from Lake Washington: up and down, back and forth and side to side. Here's how they did it.