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Guidance

TAG unit A5-3 rail appraisal

Transport analysis guidance (TAG) on the appraisal of rail interventions.

Updates to this page

From:
Department for Transport
Published:
31 May 2018
Last updated:
11 December 2025
Show all updates

  1. TAG unit A5-3 updated.

  2. TAG unit A5-3 updated.

  3. Updated with forthcoming changes for May 2025.

  4. TAG unit A5-3 updated.

  5. Forthcoming changes added.

  6. TAG unit A5-3 updated.

  7. TAG unit A5-3 updated.

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

  9. TAG unit A5-3 updated.

  10. Forthcoming changes for November 2022.

  11. Updated guidance.

  12. Notification of forthcoming change for November 2021.

  13. Updated with new version of unit A5-3 guidance.

  14. First published.

Documents

TAG unit A5-3 rail appraisal

PDF, 510 KB, 24 pages

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Details

Gives guidance on the appraisal of rail interventions.

The previous version of this guidance was published in May 2025.

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.

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