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126. A special problem arises here since traffic will arrive at the terminal junction (usually in the form of a roundabout) without leaving the main carriageway of the motorway. It is therefore imperative that adequate warning should be given so that drivers, though still on the motorway, will reduce speed to the greater extent which is necessary to enable them to negotiate the junction in safety.

127. Two signs of the kind shown in figure 46, with a white message on a blue ground, are recommended for this purpose. The first should be sited one mile, and the second (with the message amended to read '½ mile') half a mile before the junction.

128. An advance direction sign similar to that illustrated in figure 6 of Appendix IV should be sited a quarter of a mile before the junction. It should be in lettering having an x-height of eight inches. The considerations set out in paragraphs 53, 54 and 55 apply equally to this sign.

129. The exit distance markers recommended in paragraph 91 and illustrated in figure 31 should also be used at distances of 300, 200, and 100 yards in advance of the junction.

130. The sign recommended in paragraph 99 and illustrated in figure 33 should also be erected at or as near as practicable to the precise point where the motorway Regulations cease to apply. It will follow logically on the 'End of motorway' signs described in paragraph 127 above and erected a mile and half-mile in advance.

131. Where the terminal junction is in the form of a roundabout, then, as at the end of an exit slip road (paragraph 100), a sign consisting of a large white arrow on a blue ground should be erected on the roundabout to face traffic leaving the motorway. Similar signs should be erected to face the other entrances to the roundabout.

132. Some motorways will end at fly-over junctions with all-purpose roads, where one carriageway of the all-purpose road is carried over or under the motorway so that it leaves or joins the motorway on the left. On the approach to the junction along the motorway the 'End of motorway' signs described in paragraphs 126 and 127 should be erected a mile and half-mile in advance. Since there will be no choice of route to traffic approaching the junction along the motorway, advance direction signs would be inappropriate; this makes it all the more necessary that the signs indicating that the end of the motorway has been reached (illustrated in figure 33) should be prominently displayed at or as near as practicable to the junction itself. About a hundred yards before the junction there should be a sign giving warning of merging traffic, of the type illustrated in figure 41.