Guidance: TAG unit A2-4 productivity impacts

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This document gives guidance on the analysis of productivity impacts in transport appraisals.

The WITA software is in conjunction with this guidance to estimate the wider economic impacts of an appraisal.

The previous version of this guidance was published in May 2024.

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 29 May 2020 Last updated 28 November 2024 + show all updates 28 November 2024 TAG unit A2-4 productivity impacts updated.

17 October 2024 Added 'Forthcoming change: update to wider economic impacts'.

30 May 2024 TAG unit A2-4 updated.

25 April 2024 Forthcoming changes added.

29 May 2020 First published.

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