On Sun, 8 May 2016 20:54:57 +0100, bert wrote:

There are now so many changes in speed limits on most A roads in
Cheshire that its almost impossible to remember what speed limit you're
under.

You should be able to work it out from the road and street lighting.
If the limit varies from that default there should be small repeater
boards every few hundred yards.

Having said that I know of stretches of road that are "ambiguous".
Single carriage way A road. Leave a village and go past a National
Speed Limit sign (60). However the full street lighting continues but
there are no repeater boards (30). Entering next village, after the
best part of a mile, there is a single ordinary sized NSL sign on the
right (60). The village has street lighting and building(*)(30). On
leaving that village you don't pass any NSL signs, the street
lighting and buildings just end. In the opposite direction you don't
pass a twin 30 boards as you enter that village.

(*) Note the use of "street lighting", it is the presence of street
lighting that triggers the 30 limit, buildings do not have to
present. "Street lighting" is lighting designed to primarily
illuminate the carriageway. Lighting designed to illuminate primarily
walkways/pavements etc is not "street lighting" but "footway
lighting".

--
Cheers
Dave.