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Guidance: TAG unit A5-3 rail appraisal

Department For Transport

April 25
09:00 2024

Gives guidance on the appraisal of rail interventions.

The previous version of this guidance was published in May 2023.

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 2018
Last updated 25 April 2024 +show all updates
  1. Forthcoming changes added.

  2. TAG unit A5-3 updated.

  3. TAG unit A5-3 updated.

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

  5. TAG unit A5-3 updated.

  6. Forthcoming changes for November 2022.

  7. Updated guidance.

  8. Notification of forthcoming change for November 2021.

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

  10. First published.

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