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NZ Transport Agency website at nzta.govt.nz (amended) and 7A moved from Bridge manual to Bridge manual commentary. October 2018 Nigel Lloyd. The Waka Kotahi NZ Transport Agency Bridge manual commentary. First edition, Amendment 1. Effective from May 2022. Contents. C3. Design loading. C3–1. For existing highway projects, confirmation should be sought from the NZTA, or the relevant road controlling authority for non-state highway schemes, whetherThis Bridge manual sets out the criteria for the design and evaluation of bridges, culverts, Bridge manual commentary, May 2022, 196 pages [PDF, 3 MB] The Bridge manual commentary is an informative commentary that provides background to various sections of the Bridge manual. It will be added to as