Specific advice on working on the highway is available from the Department for Transports Safety at Street Works and Road Works and Chapter 8 of the Traffic Signs Manual which are available online.
Mae cyngor penodol ynghylch gweithio ar y briffordd ar gael yn nogfen ‘Diogelwch Gwaith Stryd a Gwaith Ffordd’ yr Adran Drafnidiaeth a Phennod 8 y Llawlyfr Arwyddion Traffig sydd ar gael ar-lein.