Why compete when you can complement? It looks good but it is not cheap and competes with existing river traffic, so why is Boris supporting a Thames Deckway?
SkyCycle complements existing train traffic with additional overhead cycleways, so it makes more sense than a Thames Deckway. But there might be an even better solution introduced in chapter 02 of my first novel.
This imagines bronchs which are both fresh air ducts and cycleways. Along the Thames they are anchored on the shoreline away from river traffic. It makes riding in them an amazing experience depending upon the tide; at times cyclists would be in dry clean air with their heads just above water level!
Here's to exciting practical imaginative cycling,
Elder Adok