Watching this now on Impossible Engineering. It will use overhead power.
https://www.metro-magazine.com/10007312/seattles-floating-bridge-is-high-tech-light-rail-link
Rich
Interesting.
Compare the track leveling to the rolling track cradles in the thread "Sunset Limited on Mississippi River Ferry." What a difference 100 years makes.
Very interesting!
The most difficult task will probably be adapting the rails to the movements of the bridge.