Average Speed Cameras.

Mole-In-The-Know has been doing a little research into why perfectly clear 'dual carriageways' - caused by roadworks on the third lane of motorways (and frequently without any work going on) - always have absurd 50mph limits policed by average speed cameras.
They cause delays, bottlenecks and considerable irritation for drivers. I have known some as long as 22 miles! The cameras rub salt into the wound.
Apparently, according to MITK, this absurdity is in place for 'insurance reasons'.

This silly situation needs to be remedied - and quickly.