What we need is something like this design, from Germany:
Ampelmännchen are a legacy of the evil Communist regime in the East. The sooner middle class twerps get over Ostalgie for nasty Vita Cola and fewer cars on the roads (as if it was a good thing that no-one could afford cars, because global warming) and realise what a despicable, murderous, barbaric regime it was, the better.
As for the moronic lights in Trafalgar Square, they've been there for years (indeed may have been put in under the Mayorship of the present PM, though I don't want to slander him if it wasn't so). Only yesterday I crossed Trafalgar Square and heard a tourist in a thick Yorkshire accent say to her son in absolute innocence: "What sort of sign is that for the green man?"
Which fills me with hope 99% of people don't actually know what the Trafalgar Square green man signs (and there are about 8 of them at separate crossing points, so it isn't just gay, straight, bisexual)and don't care, and that this bullshit will go away very quickly.