TAG unit A4-2 distributional impact appraisal

Guidance on the analysis of distributional impacts caused by transport interventions.



Documentation giving guidance on the analysis of various distributional impacts caused by transport.

The transport impacts considered are:

  • user benefits
  • noise
  • air quality
  • accidents
  • severance
  • security
  • accessibility
  • personal affordability

and these are analysed for their effect on individual social groups.

The previous version of this unit was TAG unit A4-2 distributional impact appraisal, December 2015. This version has been updated to align with air quality guidance regarding measurement of PM2.5.

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 29 May 2020