ADI Part 3 dual carriageways
Works on single carriageway roads - HAUC
Traffic Signs Manual/Chapter 3/2008/14 - Wikisource, the free online library
Traffic control by priority signs - HAUC
Traffic control by priority signs - HAUC
Dual carriageway - Wikipedia
Texture depth - HAUC
Quazar Cone Signs, Chapter Traffic Management Kit
Footway and footpath works – look after pedestrians - HAUC
Works at road junctions - HAUC
Dual carriageway - Wikipedia