Guidance

TAG unit A3 environmental impact appraisal

Guidance on the analysis of environmental impacts in transport appraisals.

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

Documents

TAG unit A3 environmental impact appraisal

PDF, 8591.25 KBMB, 107 pages

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Forthcoming change: carbon valuation

https://www.gov.uk/government/publications/tag-forthcoming-changes/tag-forthcoming-changes

Forthcoming change: presentation of carbon impacts in economic appraisal

https://assets.publishing.service.gov.uk/media/650983b522a783001343e873/forthcoming-change-presentation-of-carbon-impacts-in-economic-appraisal.pdf

Forthcoming change: carbon summary table

https://assets.publishing.service.gov.uk/media/651ed6a779fc58000d6396ac/carbon-summary-table.xlsx

Details

This document gives guidance on environmental impact appraisal.

The previous version of this guidance was published in May 2022.

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 316 MayOctober 2023 + show all updates

  1. Added forthcoming change about carbon valuation.

  2. TAG unit A3 guidance updated.

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

  4. Unit A3 guidance updated.

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

  6. Updated with new version of unit A3 guidance.

  7. Updated TAG unit A3 guidance.

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

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

  10. First published.