Collection

Road congestion and travel times

Statistics and data about road congestion and travel times on the Strategic Road Network and local 'A' roads.

Latest travel time measures statistics

Travel time measures data tables

All supporting statistical tables are updated on a quarterly basis. For local ‘A’ road statistics, we provide statistics by region and local highway authority which are updated on an annual basis in February.

Travel time measures statistics

Statistics on travel time measures on the Strategic Road Network and locally managed ‘A’ roads from data provided commercially by Teletrac Navman. These are produced on a quarterly basis, as an annual report for the previous year in February and subsequent table updates in May, September and November.

Guidance on current and previous travel time measures statistics are available.

Historic data tables

The following tables have been discontinued due to a methodological change in the production of congestion statistics.

About the travel time measures data and reports

Historically, we published separate statistical reports for travel time measures on the Strategic Road Network and locally managed ‘A’ roads. These were produced on a quarterly basis (in February, May, August and November). Following user feedback we decided to combine the statistical releases, with the first combined release published for the second quarter of data for 2017. From February 2018 onwards we no longer intend to publish quarterly travel time statistical reports. Instead, we will publish an annual report in February, although we will continue to update the supporting tables on a quarterly basis.

These statistics used to monitor road congestion and journey time reliability are compiled from journey time data from in-vehicle global positioning systems (GPS) and flows estimated using automatic traffic counters and the department’s manual traffic count data.

All of the statistics published are National Statistics. Road congestion and reliability statistics were assessed by the UK Statistics Authority and confirmed as National Statistics in July 2012.

Published 8 August 2013
Last updated 3 December 2020 + show all updates
  1. Travel time measures for the Strategic Road Network and local ‘A’ roads: October 2019 to September 2020 added to collection.

  2. Travel time measures for the SRN and local 'A' roads for year ending June 2020 added to collection.

  3. Collection page updated for the travel time measures for the SRN and local 'A' roads for year ending March 2020.

  4. Collection page updated for the Travel time measures for the SRN and local 'A' roads report for 2019.

  5. Updated collection page for 'Travel time measures for the Strategic Road Network and local ‘A’ roads: July 2018 to June 2019'.

  6. New statistics release published - Travel time measures for the Strategic Road Network and local 'A' roads: April 2018 to March 2019.

  7. New release published.

  8. New release published for year ending September 2018.

  9. New release published.

  10. New release published.

  11. New release published.

  12. New release published.

  13. New releases published.

  14. New releases published and summary text updated.

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  18. New releases published.

  19. First published.