The Transport Committee has launched an inquiry into the benefits and safety of smart motorways, following calls for them to be scrapped.
It comes less than a year after the publication of an 18-point action plan to improve safety, in March 2020, after a previous review of smart motorways by Transport Secretary Grant Shapps.
Since then, two coroners have raised concerns about a section of the M1 in South Yorkshire, which has all-lane running with no hard shoulder.
One concluded that smart motorways “present an ongoing risk of future deaths”, while the other referred Highways England to the Crown Prosecution Service to consider if corporate manslaughter charges are appropriate.
South Yorkshire police and crime commissioner Dr Alan Billings has also repeatedly called for the Government to 'abandon' smart motorways, labelling them “inherently unsafe and dangerous”.
Earlier this month, Transport Secretary Grant Shapps told MPs that he did not want to carry on with the system of smart motorways which he had inherited on coming into office.
Shapps said: “What I commit to is making sure that the motorways we have in this country are safer than the motorways that came before them. That is the commitment I make. To be robust and clear from the evidence of, sadly, how many people die on our motorways, they are the safest form of road, but they should be safer.”
The committee will now consider the impact of smart motorways in reducing congestion as well as public confidence in their use.
The Chair of the Transport Committee, Huw Merriman MP, said: “The Department for Transport says smart motorways help us cope with a 23% rise in traffic since 2000, helping congestion.
"The Department’s own Stocktake report points to lower fatal casualty rates for smart motorways without a permanent hard shoulder than on motorways with a hard shoulder. The serious casualty rate is slightly higher.
“This message isn’t reaching the public, whose confidence in smart motorways has been dented by increasing fatalities on these roads.
"Road safety charities are also expressing concerns. Will enhanced safety measures help? Will the public accept them following an awareness campaign? Or should there be a rethink of government policy?
“There are genuine worries about this element of the motorway network and we want to investigate how we got to this point.”
Smart motorways were introduced as a technology-driven approach to deal with congestion through increasing capacity on motorways and controlling the flow and speed of traffic. They can be divided into three different designs, of which the most common is all-lane running, introduced in 2014.
This is the type that cause the most concern for campaigners as broken down vehicles can end up stranded in live lanes.
AA president Edmund King said: “Coroners, and indeed police and crime commissioners, have voiced serious safety concerns with ‘smart’ motorways, which makes this inquiry very timely.
“For more than a decade the AA has campaigned to improve the safety of smart motorways. Tragically, too many people have died on these roads in the interim.
“Hopefully this inquiry will concentrate minds to stress the urgency of safety improvements.”