Speed limits

Have been up to Buxton for our last holiday of the year and wish to point out the speed limit from Disley to Chapel en le Frith (A6) - the start of the dual carriageway.

I kid you not, but beware to anyone who is new to this road, it changes speed limits from 30 to 40 and back again no less than 7 times.  On one section, 200 yards, it changes from 30 to 40 back to 30; also, although there are road signs, ie, on posts, some are only painted on roads, so beware when travelling in the dark when its raining/snowing or even daylight and its snowing as you will not see them.  We always travel at 30 on this section all the time.  Is there anywhere you have any potential road rage