More guidance should be given by Departments to local authorities as to when a road junction should have advance direction signs and route confirmatory signs as well as direction signs. Criteria should take into account vehicle speeds and volume of traffic (paragraph 149).
Advance direction signs on Primary routes should show place names in white and route numbers in yellow even when the place referred to is not on a Primary route; when the place is reached via a motorway the motorway letter and number should be in yellow. If a place indicated is on a road leading to a motorway the motorway route letter and number should be in brackets. Similarly on the black-on-white advance direction signs recommended for all-purpose roads other than Primary roads motorway numbers should be shown in black (paragraph 150).
The word 'Airport', or the name of the airport, may be shown on advance direction signs (paragraph 150).
Local advance direction signs should be distinguished by a blue surround of 4 stroke-widths, and be always in stack form (paragraph 151).
Direction signs should be rectangular with one end pointed. They should repeat the place name or names and route numbers on the advance direction sign. When there is no route confirmatory sign they should also give the mileage. They should be set at drivers' eye level. If the junction is wide enough they should be mounted separately at each exit ; otherwise on a single post. They should be in lower-case lettering and be reflectorised unless externally lit. On Primary routes, direction signs should be white on green when indicating places on Primary routes, but otherwise black on white, save when indicating a motorway when they should be white on blue with motorway letters and numbers. If the advance direction sign carries a route number in brackets this should be repeated on the direction signs (paragraph 152).
There should be more directional signs at junctions in urban areas (paragraph 153).
Route confirmatory signs should repeat the information on the advance direction sign and add mileages. But where the road continues for a considerable distance under the same route number, route confirmatory signs should also include up to three, or exceptionally four, names and distances of places on. the numbered route other than those shown on the advance direction sign, provided they are within 150 miles or so. These should be shown in the order in which they are reached . Places off the numbered route should be included only if they are major cities and are within about 15 miles of the numbered. route. In this case both the place name and its mileage should be shown in brackets.
Confirmatory signs should be mounted at drivers' eye level, and be placed where their message can be absorbed, normally between 75 and 150 yards beyond the junction. They should be used at junctions where traffic volumes justify a main advance direction sign (paragraph 154).
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