The rollout of new smart motorways is to be “paused” until a full five years’ worth of safety data becomes available for schemes introduced before 2020.
While further data is being collected, National Highways will continue work to complete schemes that are currently in construction, which will all open with technology in place to detect stopped vehicles.
These schemes are all more than 50 per cent completed and halting progress on them now would cause significant disruption for drivers, National Highways has said.
The government has said it will ensure current smart motorways without a permanent hard shoulder are equipped with best-in-class technology and resources to make them as safe as possible.
This will include investing £390 million to install more than 150 additional emergency areas so drivers have more places to stop if they get into difficulty.
It represents around a 50 per cent increase in places to stop by 2025.
Transport Secretary Grant Shapps said: “While our initial data shows that smart motorways are among the safest roads in the UK, it’s crucial that we go further to ensure people feel safer using them.
“Pausing schemes yet to start construction and making multimillion-pound improvements to existing schemes will give drivers confidence and provide the data we need to inform our next steps.”
National Highways CEO Nick Harris said: “We have listened to public concerns about smart motorways and we are fully committed to taking forward the additional measures the Transport Committee has recommended.
“While we pause those all lane running schemes yet to start construction, we will complete the schemes currently in construction.
“We will make existing sections as safe as they can possibly be and we will step up our advice to drivers so they have all the information they need.
“We are doing this because safety is our absolute priority and we want drivers to not just be safer, but also to feel safe on our busiest roads.”
Independent road safety campaigner, Meera Naran, whose 8-year-old son Dev, died in a motorway crash on the M6 in 2018, said: “Conventional and smart motorways both have their risks and benefits.
“I welcome this pause in the rollout of smart motorways, which will give us all a positive opportunity to assess the future of our motorway network.
“I’m encouraged by the commitment of £900 million to improve the safety of our motorways, following my campaigning since Dev died.
“However, I’ll continue to both challenge and work alongside the Department for Transport to ensure even more is done, including calling for legislation to be looked at for autonomous emergency braking and further support for ongoing driver education.”