The AA has picked up on my revelation that the Department for Transport (DfT) is sitting on a large number of post-opening evaluations of smart motorways and suggested that the loss of the hard shoulder may be responsible for an increase in delays on the strategic road network.
The DfT has published Average delay on the Strategic Road Network in England: monthly and annual averages which shows that the average delay up to June 2025 was 11.6 seconds per mile, up 5.5% in a year.
The AA said it believes that the impact of smart motorways is now “firmly under the spotlight”, adding that drivers are avoiding lane one through fear of running into a stranded vehicle, which undermines the efficiency and speed of these roads.

Another reason for increased delays on motorways without a hard shoulder is that they have less resilience when things go wrong.
Elsewhere on the network, major schemes like the one at Junction 10 of the M25 have continued to cause significant traffic jams.
The AA also noted my report that several Post Opening Project Evaluation (POPE) reports into all lane running schemes have yet to be released, and called for their immediate publication.
Head of roads policy Jack Cousens said:
With numerous stretches of so-called smart motorway now in regular use, rather than improving traffic flow it seems to have created more bottlenecks.
There are several reports about these schemes which have not yet been released by the Department for Transport which would show what, if any, improvements drivers have experienced.
We need these documents released to understand what traffic flow benefits have been made, alongside a value for money assessment on these motorways drivers perceive as dangerous.









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