The city's response to mile after mile of decaying tenements along some major highway (hmm, might've

That's what they did in Wellesley , which has its own giant hole in the ground (where the Wellesley Inn got torn down for condos that never materialized). The Swellesley Report notes the developers actually agreed to do something to keep part of the town from looking like London after the Blitz:
A white fence wouldn't exactly fit in with downtown, queensgate hotel london but it'd certainly be better than the orange-fence or whatever's there now. Are there other low-cost materials that would be even more suitable, and maybe even help set the tone for that area the way the art windows try to?
I think of the difference between typical downtown construction screening (painted plywood) and that "Here's what this could look like" cutaway silk-screened queensgate hotel london drape over that biotech building on the Mass Pike.. night and day.
What they really should do with the wall decorating is just continue that insipid "X meets Y" campaign that they threw up on the ground queensgate hotel london floors of the remaining Filene's building. Only now they could use such bon mots as
The city's response to mile after mile of decaying tenements queensgate hotel london along some major highway (hmm, might've even been the Major Deegan) was to board up the windows and paint little bucolic scenes of domestic bliss on them.