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APPENDIX D
Triangle and roundel sizes on directional signs
| Diagram No. | Description | Height in sw |
|---|---|---|
| 523.1 | Downhill gradient | 24 |
| 524.1 | Uphill gradient | 24 |
| 528 | Hump bridge | 20 |
| 529 | Swing bridge | 20 |
| 529.1 | Tunnel | 20 |
| 530 | Headroom | 24 |
| 530A | Headroom (combined imperial & metric) | 30 |
| 544 | Zebra crossing | 20 |
| 552 | Cattle grid | 30 |
| 554 | "Ford", "Gate" or "Gates" | 24 |
| 555.1 | Water course alongside road | 20 |
| 557.1 | Road hump | 20 |
| 612 | No right turn | 16 |
| 613 | No left turn | 16 |
| 616 | No entry | 16 |
| 617 with 618.1 | Vehicles prohibited | 16 |
| 619 | Motor vehicles prohibited (motorcycle symbol may be reversed) | 20 |
| 619.1 | Motor vehicles other than motorcycles prohibited | 20 |
| 619.2 | Motorcycles prohibited (symbol may be reversed) | 20 |
| 622.1A | Heavy goods vehicles prohibited (symbol may be reversed) | 30 |
| 622.5 | Horse drawn vehicles prohibited (symbol may be reversed) | 20 |
| 622.7 | Towed caravans prohibited (symbol may be reversed) | 20 |
| 622.8 | Vehicles carrying explosives prohibited | 24 |
| 626.2A | Weak bridge (roundel only) | 24 |
| 629 | Width restriction (imperial) | 24 |
| 629A | Width restriction (combined imperial & metric) | 30 |
| 629.1 | Length restriction (imperial) (symbol may be reversed) | 30 |
| 629.2 | Height restriction (imperial) | 24 |
| 629.2A | Height restriction (combined imperial & metric) | 30 |
| 770 | Level crossing with gate or barrier | 20 |
| 771 | Level crossing without gate or barrier | 20 |
| 772 | Tram crossing | 20 |
| 779 | Electrified cable | 20 |
| 950 | Cycle route warning sign | 20 |
| 952 | Buses prohibited (symbol may be reversed) | 20 |
| 953 with 953.2 | Buses and cycles only (symbols may be reversed) | 20 |
| 953.1 with 953.2 | Trams only | 20 |
NOTES
- Where two signs of different sizes are placed side by side, the larger size should be used for both.
- Supplementary plates have an x-height of 80% of the main x-height.
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