Guidance
TAG unit A5-2 aviation appraisal
Transport analysis guidance (TAG) on the appraisal of aviation interventions.
Documents
Details
This document describes how to apply TAG in the context of aviation interventions.
The previous version of this guidance was published in .
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.
Updates to this page
Published 31 May 2018
Last updated 17 April 2025
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Added 'Forthcoming change: appraisal data update'.
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TAG unit A5-2 updated.
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Added forthcoming change about appraisal guidance updates.
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TAG unit A5-2 updated.
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Forthcoming changes for November 2022.
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First published.