A1 APPENDIX — TABLES
| TSRGD diagram no. |
Type | Single carriageway road (permanent speed limit of 30mph or less) |
Single carriageway road (permanent speed limit of 40mph) |
Single carriageway road (permanent speed limit of 50 mph or more) |
Dual carriageway road (permanent speed limit of 40mph or less) |
Dual carriageway road (permanent speed limit of 50mph or 60mph) |
Dual carriageway road (national speed limit)
|
|---|---|---|---|---|---|---|---|
| 7306 | x-height | 100 | 100 | 125 | 100 | 125/150* | 200 |
| 7307 | x-height | 100 | 100 | 125 | 100 | 125/150* | 200 |
* The larger x-height should be used on dual-carriageways with a permanent speed limit of 60mph.
(a) — Diagram 610 — if this sign is vehicle mounted it should be 1500 mm in diameter unless this is not practicable in which case the largest sign possible should be used.
(b) — Diagram 7202 — For works for which relaxations apply, the size of signs to diagram 7202 on the left-hand side of the carriageway should be as given above but the signs on the central reservation may be reducedto 1350mm. The x-height on the supplementary plate to diagram 7208 should be reduced proportionally.
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