National Statistics

Travel time measures for the Strategic Road Network and local 'A' roads: October 2016 to September 2017

Statistics on travel time on the Strategic Road Network and on locally managed ‘A’ roads for the year ending September 2017.

Documents

Travel time measures for the Strategic Road Network and local 'A' roads: October 2016 to September 2017 tables

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Details

Some of the local ‘A’ road estimates presented in this release have been revised. Please see our February publication for updated figures and further details.

The main impact is to the local ‘A’ road morning peak figures for January and February 2017. Estimates for the Strategic Road Network are unaffected.

The average delay and speed on the Strategic Road Network and local ‘A’ roads, for the year ending September 2017. There is an additional measure of reliability for the Strategic Road Network.

Strategic Road Network (SRN) for the year ending September 2017

The average delay is estimated to be 8.9 seconds per vehicle per mile (spvpm), compared to free flow, a decrease of 1.0% on the previous year.

The average speed is estimated to be 59.5 mph, similar (up 0.3%) to the previous year.

The reliability of travel times is measured using the Planning Time Index. This presents 67.4% of additional time needed compared to free flow, on average, on individual roads sections to ensure on time arrival. This is down 1.1 percentage points compared to the previous year.

Local ‘A’ roads for the year ending September 2017

Average delay is estimated to be 46.4 seconds per vehicle per mile, compared to free flow, an increase of 1.7% on the previous year.

The average speed is estimated to be 25.3 mph, the same as in the previous year.

Please note that figures for the SRN and local ‘A’ roads are not directly comparable.

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Road congestion and travel times

Published 30 November 2017