Guidance

TAG unit A3 environmental impact appraisal

Transport Analysis Guidance (TAG) on the analysis of environmental impacts in transport appraisals.

From:
Department for Transport
Published
31 May 2019
Last updated
3119 MayApril 2023 — See all updates

Documents

TAG unit A3 environmental impact appraisal

PDF, 859946 KB, 10788 pages

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Forthcoming change: spring 2023 data book and guidance updates

https://www.gov.uk/government/publications/tag-forthcoming-changes/forthcoming-change-spring-2023-data-book-and-guidance-updates

Details

This document gives guidance on environmental impact appraisal.

The previous version of this guidance was published in MayJuly 20222021.

TAG provides information on the role of transport modelling and appraisal, and how the transport appraisal process supports the development of investment decisions to support a business case.

Published 31 May 2019
Last updated 3119 MayApril 2023 + show all updates

  1. TAG unit A3 guidance updated.

  2. Added forthcoming change: spring 2023 data book and guidance updates

  3. Unit A3 guidance updated.

  4. Forthcoming change to guidance note added, the note details guidance alterations to be implemented in May 2022.

  5. Updated with new version of unit A3 guidance.

  6. Updated TAG unit A3 guidance.

  7. NO2 changed back to NOx in 3.2.7 following Department for Environment, Food & Rural Affairs clarification.

  8. Information updated for technical errors NOx changed from NO2 in 3.2.7 and 3.4.4.

  9. First published.