Campaigners believe evaluations have been suppressed as they cast further doubt on safety and economic benefits
Road campaigners and motoring organisations have urged UK government ministers to immediately release a series of “withheld” safety assessments of smart motorways – some dating back to 2022.
Designed to increase capacity, smart motorways have the hard shoulder converted into a live lane of traffic, relying on occasional laybys and electronic overhead signs to close lanes in emergencies.
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