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In the year ending December 2014:
78.6% of journeys on the Highways Agency’s network were ‘on time’, a 0.3 percentage point increase on the year ending September 2014.
In recent trends:
reliability fell for 12 consecutive months from a March 2012 peak of 81.5%. Reliability has been broadly stable since March 2013
the recent stabilisation of reliability levels is believed to mostly relate to a combination of improved weather conditions, particularly less rain, and increases in traffic on motorways and rural ‘A’ roads, relative to the previous year