Guidance

TAG unit M4 forecasting and uncertainty

Transport Analysis Guidance (TAG) provides information on the role of transport modelling and appraisal.

From:
Department for Transport
Published
31 May 2019
Last updated
218 DecemberAugust 2022 — See all updates

Documents

TAG unit M4 forecasting and uncertainty

PDF, 437673 KB, 5336 pages

Forthcoming changeschange note to TAG unit M4 forecasting and uncertainty

https://www.gov.uk/government/publications/tag-forthcoming-changes/updates-to-guidance-on-forecasting-and-uncertaintyPDF, 161 KB, 10 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.

TAG unit M4 forecasting and uncertainty, including forthcoming changes for November 2022

PDF, 562 KB, 38 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 gives guidance on the analysis of forecasting and uncertainty in transport appraisals.

The guidance is supplemented by the Uncertainty Toolkit.

The previous version of this guidanceunit was releasedTAG inunit M4 forecasting and uncertainty, May 20192018.

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 2019
Last updated 218 DecemberAugust 2022 + show all updates

  1. TAG unit M4 forecasting and uncertainty updated.

  2. Forthcoming change to guidance note added, giving details of updates to be made in November 2022.

  3. First published.