Guidance

Road congestion and travel times statistics information

Guide to road congestion and travel time statistics, their source documents, notes and definitions plus supporting technical documents.

Published 11 August 2016
Last updated 16 September 2020 — see all updates
From:
Department for Transport

Documents

National Statistics Status of Road Reliability and Congestion

HTML

Travel time measures for the Strategic Road Network and local ‘A’ roads: pre-release access

HTML

Travel time statistics background quality report

PDF, 1.9MB, 13 pages

Percentage of data imputed for travel time statistics on the local 'A' road network, by month

ODS, 7.79KB

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Percentage of data imputed for travel time statistics on the Strategic Road Network, by month

ODS, 8KB

This file is in an OpenDocument format

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

Tables displaying the level of imputation for historic data tables CGN01, CGN02, and CGN09 have been removed, as these are no longer produced.

Road congestion and travel time statistics notes and definitions and other source documents.

Published 11 August 2016
Last updated 16 September 2020 + show all updates

  1. Pre-release access page added, SRN and local 'A' roads imputation tables updated for the year ending June 2020.

  2. SRN and local 'A' roads imputation tables updated for the year ending March 2020.

  3. National Statistics designation page for road reliability and congestion added. Data tables for the Strategic Road Network and local 'A' roads updated for the 2019 travel time measures report.

  4. Updated imputation tables for 'Travel time measures for the Strategic Road Network and local ‘A’ roads: July 2018 to June 2019'.

  5. SRN and local 'A' roads imputation tables updated for the year ending March 2019.

  6. SRN and local 'A' roads imputation tables updated for the 2018 report.

  7. Local roads and SRN monthly data tables updated for the year ending September 2018.

  8. Local roads and Strategic Road Network monthly data tables updated for the year ending June 2018.

  9. Local roads and SRN monthly data tables updated.

  10. Local roads and SRN monthly data tables updated for the year ending December 2017.

  11. Local roads and SRN monthly data documents updated.

  12. Local roads and SRN monthly data documents updated.

  13. Local roads and SRN monthly data documents updated.

  14. SRN, Highways England and local speed data documents updated.

  15. Local roads and SRN monthly data documents updated.

  16. Local roads and SRN monthly data documents updated.

  17. First published.

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