Average delay, average speed and reliability of travel times on the Strategic Road Network (SRN; motorways and ‘A’ road network managed by Highways England), for the year April 2016 to March 2017.
The average delay is estimated to be 9.0 seconds per vehicle per mile compared to free flow. This is similar to (0.2% down) on the year ending December 2016.
The average speed was 59.4mph. This is similar to (0.1% increase) on the year ending December 2016.
The reliability of travel times is measured using the Planning Time Index. This presents 68% of additional time needed compared to free flow, on average, on individual road sections to ensure on time arrival. This is similar to (0.1% down) on the year ending December 2016.