RAILWAY LEVEL CROSSINGS
YELLOW BOX MARKINGS
19.18 Yellow box markings to diagram 1045 may be provided only where specified in the level crossing order. They should be provided at AHBCs if the road traffic flow in any one direction exceeds the figures in table 19-2, but not normally at other types of crossing. Figure 19-1 shows a layout for a box marking at a single or double track railway crossing.
19.19 Where a long box is required (up to the 30 m maximum prescribed), the marking should be extended using additional diamond shaped units on the approach side and additional diagonal crosses on the trailing side of the crossing (see figure 19-2).
fig19.2
| Overall width of carriageway (m) |
Yellow box to be provided if vehicle numbers in any one hour in either direction exceed |
|---|---|
| 5.0 to 5.9 | 500 |
| 6.0 to 7.4 | 600 |
| 7.5 and over | 750 |
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