TAG unit M4 forecasting and uncertainty
Transport Analysis Guidance (TAG) provides information on the role of transport modelling and appraisal.
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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 unit was TAG unit M4 forecasting and uncertainty, May 2018.
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.
Last updated 8 August 2022 + show all updates
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Forthcoming change to guidance note added, giving details of updates to be made in November 2022.
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First published.