The stark truth of speed limits is thus: When a pedestrian (for that read road workman) is hit at 30mph 9 out of ten, though badly injured survive, at 40mph 9 out of ten die.
Speed limits are not put there for fun and should be respected. If you choose to think you know better, then, you deserve to get hammered.
I doubt very much that it is a funding opportunity, more a deliberately planned programme to make the sites safe for all.