I can turn that on but it doesn't work well because of the way speed limit signs are done round here/the way the software works. It drops the speed limit when you turn (either a roundabout or a corner) and needs a new one after the turn to re-learn.
I don't know if it's national but the urban roundabouts around town here have a speed sign on the approach then sometimes a modifier after the roundabout but if it is still whatever the approach speed limit was then there is no sign so the car has nothing to work with.
For instance here, the road we are in is a 30mph. The sign on the left increases that to 40 for the roundabout, then if you turn left there is no modifier but straight over it has a 30.Go straight across and you get 30
www.google.com/maps/@51.4238079,-0.8414193,3a,75y,83.76h,77.16t/data=!3m6!1e1!3m4!1sgAxQ-BbzBbiDBksf9s2SFA!2e0!7i16384!8i8192
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