Guidance

Common analytical scenarios databook

A selection of data tables, published alongside the TAG uncertainty toolkit, to help consider and model the common analytical scenarios.

From:
Department for Transport
Published
8 August 2022
Last updated
3124 MayAugust 20232022 — See all updates

Documents

Common analytical scenarios databook

ODS, 2.5443 MBKB

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Forthcoming change note to common analytical scenarios databook

PDF, 161 KB, 10 pages

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Details

Detailed assumptions and inputs for modelling the common analytical scenarios (CAS) outlined within the Department for Transport’s TAG uncertainty toolkit.

The publication will become formal guidance in November 2022.

The CAS databook scenario grid (SG) explains the assumptions in each scenario. It supplements the TAG databook, which should be used for all values pertaining to the core scenario.

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 8 August 2022
Last updated 3124 MayAugust 20232022 + show all updates

  1. Updates made to marginal external costs, car costs and car and bus journey times.

  2. Corrected an error in the fuel efficiencies for the Mode-balanced Decarbonisation scenario.

  3. First published.