In cases of doubt under the latter head the numbering should start from the end of the street which is nearest to the town centre.
(k) The numbers should be displayed immediately over the entrance door or on a post, boundary wall or railings immediately adjacent to the gate or entrance, whichever may be nearest to the public footpath from which the premises are reached. They should not be placed in positions where they may be obscured or overshadowed or their prominence diminished by surrounding features, or where they may not easily be seen from the carriageway.
(l) The numbers should be not less than 2 in. in height and their colour should be in contrast with that of the background against which they are displayed. 'They should be of durable material not likely to be easily obliterated or to suffer from the effects of the weather.
(m) In many instances the existing numbering of streets differs from the arrangement recommended in (7) above, and we: recommend that where present conditions are such as to be likely to cause difficulties re-numbering on the lines recommended should be carried out.
III. WHITE LINES AND OTHER TRAFFIC SIGNS ON THE CARRIAGEWAY
(A) WHITE LINES
Purposes for which white lines may be used
145. White lines on highways are used for the following purposes:
(i) Across highways as transverse "Stop" lines at road junctions where traffic is controlled by police constables, by light signals, or by "Halt at Major Road Ahead" signs.
(ii) Longitudinally along highways
(a) to guide traffic at junctions;
(b) to guide traffic at curves, both horizontal and vertical, and at central refuges on the carriageway;
(c) to define traffic lanes on open lengths of road; and
(d) to define the boundary of the main carriageway at entrances to side roads, lay-bys, roadside dumps, etc. .
We desire to emphasise that continuous longitudinal lines should be used only where conditions are of the nature outlined in paragraphs 147 to 149. Their use in other circumstances can only detract from their effectiveness as warning signs.
Diagrams 119 to 122 in Appendix VI show typical white line markings.
Transverse stop lines
146. Transverse stop lines should be laid down only in the conditions specified in section (i) of the preceding paragraph. The police, and in appropriate cases the Ministry of War Transport's Divisional Road Engineer and the motoring organisations, should be consulted before stop lines are laid down. On two-way carriageways they should extend across the nearside half of the carriageway, and on one-way carriageways across the whole width of the carriageway. At junctions where continuous filtering to the left is permitted
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