I have been on wide open dual carridgeways with no junctions etc, with a 40mph speed limit. This must be very good money spinner. I wonder how much the new speed limits are based on false research just like the 70mph on motorways. A very senior RAC official said at the time: “There are enough red herrings in this to fill the hold of the largest Grimsby trawler.” N. Slade Worksop