Research and analysis

The role of distributional weights in transport appraisal

Explores the role and methodology for using distributional weights in transport appraisal.

• From: Department for Transport
• Published: 28 May 2026

Documents

Distribution incidence research

PDF, 2.86 MB, 184 pages

This file may not be suitable for users of assistive technology.

Request an accessible format.

If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email webmasterdft@dft.gov.uk. Please tell us what format you need. It will help us if you say what assistive technology you use.

Details

The study aims to explore the role of distributional weights (DW) in transport appraisal, following HM Treasury Green Book principles.

It provides a review of a methodology developed by the Department for Transport (DfT) for implementing DW in appraisal. It also considers the implications of benefits pass-through into other markets, as benefits in one market can lead to effects elsewhere.

ARUP and the Institute for Transport Studies completed this research on behalf of DfT.

Published 28 May 2026