<p>It is up to the Highways Authority and the Police to decide whether to use cameras and how they wish to operate them. Guidance was issued in 2007 entitled “Use of speed and red-light camera for traffic enforcement: guidance on deployment, visibility and signing”.This can be viewed on GOV.UK. This guidance is not mandatory but on 20 October 2015 we wrote to local authorities drawing it to their attention.</p><br /><p>The Department issued revised guidance entitled “Setting local speed limits” in January 2013 aimed mainly at local traffic authorities who are responsible for setting speed limits on local roads. It has been designed to help explain to everyone why and how local speed limits are determined. This guidance was revised following full public consultation in Summer 2012 and is available online on GOV.UK.</p>