Road traffic statistics

Statistics on vehicle miles travelled by vehicle type, road category and region.

Department for Transport (DfT) traffic statistics provide estimates of the vehicle miles travelled each year in Great Britain, by:

  • vehicle type
  • road category
  • region

We release both quarterly and annual estimates.

The finalised annual road traffic estimates for the period ending December 2017 are due to be published on 5 July 2018. Following this, we will be publishing provisional road traffic estimates (April 2017 to March 2018) on 19 July 2018.

Our geographical website allows users to view and download estimated traffic flows on every link of the ‘A’ road and motorway network in Great Britain. The interactive map provides a mapped background to identify traffic flows in specific areas of the country.

See the privacy information notice for road traffic counts.

An index sheet of all the road traffic statistical tables is available.

Methodology review

DfT road traffic statistics team are conducting a review of the traffic estimates for Great Britain. The aim of the review is to ensure robust traffic estimates continue to be produced, seeking innovation and greater value for money in their production while protecting user needs. The review is due to be completed in 2016.

A report summarising the review so far and detailing individual projects is available.

Technical information

Provisional traffic estimates are based on traffic data collected continuously from a national network of around 180 Automatic Traffic Counters (ATC).

Provisional estimates are published quarterly and remain provisional until they have been constrained by the final annual estimates each year.

Final annual road traffic estimates are mainly based on around ten thousand manual counts, which are combined with ATC data and road lengths to produce overall estimates.

Traffic estimates for major roads are based on a census whereas traffic estimates for minor roads are estimated by calculating growth rates from a fixed sample of count points on the minor road network.

Further technical information on the traffic statistics and the production of traffic estimates is available.

National statistics

All of the statistics published are national statistics.

Road traffic statistics were assessed by the UK Statistics Authority and confirmed as a national statistic in February 2013.

Pre-release access list

The statistical pre-release access list gives access to certain post holders up to 24 hours before release.

Contact us

Road traffic and vehicle speed statistics

Latest road traffic statistics

Publications 2017

Publications 2016

Publications 2015

Publications 2014

Publications 2013

Publications 2012

  1. Road traffic estimates 2010 (revised)
  2. Road traffic estimates: 2011
  3. Road traffic estimates for Great Britain: quarter 3 2012

Data tables

  1. Road traffic statistics (TRA)
  2. Quarterly traffic estimates (TRA25)
  3. Road traffic: Statistical tables index
Published 8 August 2013
Last updated 19 July 2018 + show all updates
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