Money not safety.
The author describes how it is so easy to miss the new 20 mph limits in London and includes this comment: “If only speed limits were the end of it. But they’re not. Blundering into ever-expanding low-traffic neighbourhoods (fine), congestion zones (fine) or emissions zones (fine); bus lanes that suddenly rear out of the side of the road (fine); yellow box junctions set up like fiendish games of chance (fine) – it can all seem like a confusing, infuriating lottery in reverse. Instead of low odds you’ll win, there are high odds you’ll lose. Single streets – like Lansdowne Drive in Hackney – have earned councils more than £1m in just a few months”.