NOTE 5: Smaller sizes, for use in bollards and alongside traffic signals, are not shown in the table.
NOTE 6: Smaller sizes, for use in bollards, are not shown in the table.
NOTE 7: This sign is normally used only where the speed limit is 30 mph or less (see para 4.22).
NOTE 8: The sizes of signs to diagrams 622.5, 622.6, 625.1, 810 and 951 are related to site conditions and not to the speed of traffic. Generally, the unbracketed size shown alongside the diagram should be used. The smaller sizes shown for diagrams 625.1 and 951 are used where the signs are mounted on, or in, bollards. The smaller size for diagrams 622.5 and 622.6 may be appropriate where amenity considerations or physical constraints apply. The larger sizes for diagrams 810 and 951 should be used where there is a need to increase conspicuity, or, in the case of diagram 810, where the sign is mounted on the opposite side of the road.
NOTE 9: These signs have a range of x-heights shown as minimum and maximum. The sizes shown in the table are those appropriate for a particular traffic speed. However, intermediate sizes may be used, especially where the traffic speed is in the middle of the range for a specific column (e.g. where the 85th percentile speed is 35 mph, the x-height of the sign to diagram 818.2 could be 110 mm). The maximum x-height of 250 mm for the sign to diagram 878 is not shown as this size is unlikely to be used, but might be considered for motorways with four or more lanes.
NOTE 10: The smallest size (20 mm x-height) is likely to be appropriate when the sign faces the footway (see para 6.16).
NOTE 11: Where the "no entry" sign to diagram 616 is used with a supplementary plate to diagram 954 or 954.2, see para 15.22. Where the “no entry” sign is used in connection with a contra-flow cycle lane, see para 17.19.
NOTE 12: Where the sign to diagram 619 is used in connection with an advisory contra-flow cycle lane, see para 17.27.
NOTE 13: Where an "Except local buses" supplementary plate is required with a 1200 mm diameter sign to diagram 952, this should be a variant of diagram 620, with an x-height of 125 mm.
NOTE 14: The table below shows the appropriate x-height of diagram 954.4 when used with the "no through road" sign to diagram 816.
| x-height of diagram 954.4 (mm) |
Height of diagram 816 (mm) |
|---|---|
| 400 | 37.5 |
| 480 | 50 |
| 560 | 62.5 |
166
