The Department for Transport has completed development of a draft technical document that gives traffic authorities guidance on how to collect and manage digital speed limit data in a nationally consistent way. This draft is being tested through pilots, first in Lancashire as part of a Road Safety Partnership Grant-funded project looking at an advisory form of Intelligent Speed Adaptation, and more recently through a second pilot with Greater Manchester, building on work they have started as part of their review of A and B road speed limits. The technical document will be made available to authorities to use following any necessary post-pilot revisions.