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Details
Detailed assumptions and inputs for modelling the common analytical scenarios (CAS) outlined within the Department for Transports TAG uncertainty toolkit.
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 17 November 2023 +show all updates
Error correction: correction to the values of time for the technology scenario.
Updates made to marginal external costs, car costs and car and bus journey times.
Corrected an error in the fuel efficiencies for the Mode-balanced Decarbonisation scenario.
