Meeting with some guys at City Hall from Dunlop something or other about the magic speed hump I am looking into.

This hump deflates and lies flat if you go over it at the set speed, but acts as a hump if you drive over the speed limit. So it rewards good drivers. They have made lots of improvements and I am going to go to the Transport Research Laboratory to see it tested with emergency vehicles and buses. This all feeds into my scrutiny on road humps. (You can read more about it in my column on the subject).