Official Statistics

Road traffic statistics methodology review

Report summarising the projects undertaken as part of the road traffic statistics methodology review and their progress to date.



The department’s road traffic statistics team have conducted a review of the traffic estimates for Great Britain. The overview document gives a summary to the review, and the conclusions. Alongside the overview document on this page, detailed reports on projects from the review have been published as the projects were completed.

The aim of the review was to seek opportunities for innovation and efficiencies in the production of traffic estimates, without degrading their quality in terms of accuracy and reliability, timeliness, and meeting user needs.

The focus of the review was:

  • a detailed review of the methodology for producing quarterly and annual traffic estimates, which includes both methodological improvements plus any efficiencies in sampling and analysis
  • investigating alternative data sources and, if appropriate, determining robust methods for their use in producing traffic estimates

Feedback and questions are welcomed via the Road Traffic Statistics Team inbox.

Published 13 August 2015
Last updated 5 July 2018 + show all updates
  1. Reports and methodologies updated to coincide with the 2017 road traffic estimates release.
  2. First published.