Reliability of journeys on the Highways England motorway and 'A' road network
Reliability journey statistical indicators on Highways England roads.
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Details
DfT Business plan impact indicator
Geographical coverage: England
Information broken down by: national level aggregation
Latest data
78.7% of journeys on Highways England (formerly Highways Agency) managed roads between April 2014 and March 2015 were ‘on time’. This is a 0.1 percentage point increase on the previous rolling year, ending February 2015.
During the month of March 2015, provisional data shows that 79.9% of journeys on Highways England’s motorway and ‘A’ road network were ‘on time’. This is a 1.0 percentage point increase on the equivalent figure for March 2014.
Percentage of journeys on Highways England motorways and ‘A’ roads ‘on time’: monthly from June 2012
| Year ending 1 | Month | Year ending percentage points change | |
|---|---|---|---|
| June 2012 | 80.7 | 79.4 | -0.2 |
| July 2012 | 80.5 | 78.6 | -0.3 |
| August 2012 | 80.2 | 78.6 | -0.2 |
| September 2012 | 79.8 | 77.4 | -0.4 |
| October 2012 | 79.5 | 76.4 | -0.4 |
| November 2012 | 79.0 | 73.3 | -0.5 |
| December 2012 | 78.6 | 70.1 | -0.5 |
| January 2013 | 78.0 | 73.5 | -0.6 |
| February 2013 | 77.6 | 76.0 | -0.4 |
| March 2013 | 77.1 | 77.7 | -0.5 |
| April 2013 | 77.2 | 81.7 | +0.1 |
| May 2013 | 77.0 | 80.2 | -0.2 |
| June 2013 | 77.2 | 81.2 | +0.2 |
| July 2013 | 77.3 | 80.2 | +0.1 |
| August 2013 | 77.3 | 78.5 | 0.0 |
| September 2013 | 77.4 | 78.7 | 0.1 |
| October 2013 | 77.4 | 75.8 | -0.1 |
| November 2013 | 77.5 | 74.6 | +0.1 |
| December 2013 | 77.8 | 74.6 | +0.3 |
| January 2014 | 78.0 | 75.7 | +0.2 |
| February 2014 | 78.0 | 76.1 | 0.0 |
| March 2014 | 78.1 | 78.8 | +0.1 |
| April 2014 | 78.0 | 80.8 | -0.1 |
| May 2014 | 78.1 | 81.0 | +0.1 |
| June 2014 | 78.2 | 82.4 | +0.1 |
| July 2014 | 78.2 | 80.0 | 0.0 |
| August 2014 | 78.1 | 77.6 | -0.1 |
| September 2014 | 78.3 | 81.6 | +0.2 |
| October 2014 | 78.4 | 76.7 | +0.1 |
| November 2014 | 78.5 | 75.3 | +0.1 |
| December 2014 | 78.6 | 76.2 | +0.1 |
| January 2015 | 78.7 | 76.6 | +0.1 |
| February 2015 | 78.6 | 76.1 | 0.0 |
| March 2015 | 78.7 | 79.9 | +0.1 |
Source: Highways England Traffic Information System (HATRIS) Database
P = provisional
Background information
This indicator monitors the reliability of journeys made on Highways England’s motorway and A road network.
The indicator is measured by the percentage of ‘journeys’ on these roads that are ‘on time’. For this measure:
- a ‘journey’ represents travel between adjacent junctions on the network
- an ‘on time journey’ is defined as one which is completed within a set reference time, drawn from historic data on that particular section of road
- reference journey times are updated for the April data each year, further information on the impact of updating reference times can be found in the latest statistical release
As set out in our latest release of the reliability statistics, we are planning to change the method we use to calculate reliability on Highways England roads for April 2015 data onwards, as part of a wider package of changes. As a result, there will be no further updates to the statistical series for the current reliability measure after the final March 2015 statistics. Reliability statistics using the new methodology are expected to be published from August 2015.
- publishing schedule: monthly
- last updated: 11 June 2015
- next update: August 2015 (using the new reliability statistics methodology)
Other related data and information
- An introduction into the Department for Transport’s congestion statistics
- Methodology for calculation of reliability on Highways England’s motorway and ‘A’ road network
Further information
For further information on this impact indicator, please contact: Jay Symonds or 020 7944 6579
Updates to this page
Published 12 December 2013Last updated 11 June 2015 + show all updates
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Updated to the latest data for March 2015.
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Updated to the latest data for March 2015.
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Updated to the latest data for February 2015.
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Updated to the latest data for January 2015.
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Updated to the latest monthly data for October 2014.
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Monthly data updated for August 2014.
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Reliability of journeys on the Highways Agency motorway and A road network updated with January 2014.
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Reliability of journeys on the Highways Agency motorway and A road network updated with December 2013.
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First published.
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Monthly congestion reliability indicator page updated to November 2012. This outlines the latest data.