Guidance

TAG unit A5-2 aviation appraisal

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

• From: Department for Transport
• Published: 31 May 2018
• Last updated: 29 May 2025 — See all updates

Documents

TAG unit A5-2 aviation appraisal

PDF, 749 KB, 19 pages

This file may not be suitable for users of assistive technology.

Request an accessible format.

If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email webmasterdft@dft.gov.uk. Please tell us what format you need. It will help us if you say what assistive technology you use.

Details

This document describes how to apply TAG in the context of aviation interventions.

The previous version of this guidance was published in November 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 29 May 2025 + show all updates

1. 29 May 2025

   TAG unit A5-2.

2. 17 April 2025

   Added 'Forthcoming change: appraisal data update'.

3. 30 November 2023

   TAG unit A5-2 updated.

4. 19 October 2023

   Added forthcoming change about appraisal guidance updates.

5. 30 November 2022

   TAG unit A5-2 updated.

6. 19 October 2022

   Forthcoming changes for November 2022.

7. 31 May 2018

   First published.