Highways England appears to have been caught by surprise at traffic growth of 10-13% in just one year on the first two sections of M25 smart motorway, where the hard shoulder has been converted to a permanent extra traffic lane.
The UK’s first smart motorway all lane running (SM-ALR) schemes were introduced on London’s orbital motorway in spring 2014 between junctions 23 (A1(M)) and 27 (M11) on the north side; and junctions 5 and 7 on the south side, straddling Surrey...
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