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Guidance

TAG unit M3-1 highway assignment modelling

Transport analysis guidance (TAG) on the analysis of highway assignment modelling in transport appraisals.

From:
Department for Transport
Published
29 October 2013
Last updated
28 May 2026 — See all updates

Documents

TAG unit M3-1 highway assignment modelling

PDF, 1.17 MB, 119 pages

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Details

This document gives guidance on the analysis of highway assignment modelling in transport appraisals.

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 October 2013
Last updated 28 May 2026 show all updates

  1. TAG unit M3-1 updated.

  2. Updated with forthcoming changes for May 2026.

  3. TAG unit M3-1 updated.

  4. Forthcoming changes for TAG unit M3-1 added.

  5. Changes to text re-emphasise the importance of the fitness for purpose of transport models and the integrity of demand matrices.

  6. First published.

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