Research and analysis

Distributional impact appraisal audit

Provides an audit of the distributional weighting calculations used by the Department for Transport (DfT).

• From: Department for Transport
• Published: 31 October 2024

Documents

Audit of distributional weight analysis: audit technical note

PDF, 698 KB, 14 pages

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Audit of distributional weight analysis: review of DfT's technical paper

PDF, 549 KB, 25 pages

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Audit of distributional weight analysis: think piece

PDF, 483 KB, 28 pages

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Details

Distributional analysis looks at how a policy programme or funding decision may have different effects on different groups within society.

This research provides an audit of the code and methodology used to calculate distributional impacts within transport analysis guidance (TAG) appraisal. The audit is done in 3 parts:

• an audit of distributional weight analysis technical note
• a review of DfT’s audit of distributional weight analysis
• a think piece on the audit of distributional weight analysis

This research was undertaken by Arup and the Institute for Transport Studies at the University of Leeds on behalf of DfT.

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 October 2024