INTERIM ADVICE NOTE 198/17 Existing Dual Carriageway All ...

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1.1.3. The requirements in TD 9 [Ref 1], TD 22 [Ref ]2 and TD 27 [Ref 3] shall be applied to the design in the first instance. Only where it is not considered practicable by the designer, in consultation

  Design, Dual, Existing, Carriageway, The design, Existing dual carriageway