Table 7/1
| Road Surfaces | ± 6mm |
| Basecourse | ± 6mm |
| Upper roadbase in pavements without basecourse | ± 8mm |
| Roadbase other than above | ± 15mm |
| Sub-base under concrete pavement surface slabs laid full thickness in one operation by machines with surface compaction | ± 10mm |
| Sub-bases other than above | +10mm - 30mm |
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