Guidance: TAG: forthcoming changes to data book and guidance

Department For Transport

October 13
14:33 2021

Forthcoming change November 2021: updates to TAG data book and guidance

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Information on changes to the TAG data book and units A1.2 (scheme costs) and A5.3 (rail appraisal).

These updates reflect the latest evidence on fuel and electricity prices, emissions factors and economic and demographic data. The updates also provide clarification in the application of Quantified Risk Assessments and optimism bias in scheme appraisal.

TAG provides information on the role of transport modelling and appraisal, and how the transport appraisal process supports the development of investment decisions and business cases.

Published 13 October 2021

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