Motorway hard shoulders should not be used as permanent driving lanes, MPs on the Transport Select Committee have warned.In a report published today (30 June), the Committee warns Government should not proceed with 'All lane running' schemes while major safety concerns exist.In 'All lane running', the latest version of smart motorways, the hard shoulder is used as a live lane of traffic. Previous schemes have only used the hard shoulder at peak times or to deal with congestion.The Committee did not agree with government that this is an incremental change and a logical extension of previous schemes. It concluded that the permanent loss of the hard shoulder in all lane running schemes was a radical change and an unacceptable price to pay for such improvements.Chair of the Transport Select Committee, Louise Ellman MP, commented: "The permanent removal of the hard shoulder is a dramatic change. All kinds of drivers, including the emergency services, are genuinely concerned about the risk this presents."It is undeniable that we need to find ways of dealing with traffic growth on the strategic network. But All Lane Running does not appear to us to be the safe, incremental change the Department wants us to think it is. While 'smart motorways' have existed for years, this is fundamentally different. Government needs to demonstrate that All Lane Running schemes do not make the road any less safe that the traditional motorway with a hard shoulder."The government has a model which has worked. The scheme on the M42 has a track record of safety and performance but subsequent versions have gradually lowered the standard specification. The most recent incarnations of All Lane Running have less provision for safety measures than original pilot schemes."The Committee heard significant concerns about the scarcity, size and misuse of emergency refuge areas. We also heard about worryingly high levels of non-compliance with Red X signals. Levels of public awareness and confidence about using these motorway schemes are unacceptably low."Government needs to demonstrate considerable improvement in this area, including more emergency refuge areas, driver education and enforcement, before the Committee will endorse the extension of a scheme which risks putting motorists in harm's way."In 2015, the Department for Transport forecasted that traffic on the strategic road network would increase by up to 60% by 2040. The government sees smart motorways as a way of addressing this growth without incurring the costs of traditional motorway widening.Plans are in place to permanently convert the hard shoulder into a running lane on around 300 miles of motorway. Highways England has a programme of 30 all lane running schemes to the value of circa £6 billion over the next nine years.RAC chief engineer David Bizley: “Whilst supporting smart motorways as a cost effective and relatively rapid way of increasing motorway capacity, the RAC has repeatedly expressed concerns about the latest design which turns the hard shoulder on motorways into a permanent running lane. These concerns are widely shared by other industry groups, as well as by our members and others who regularly use motorways.“We therefore welcome the Select Committee report and are pleased that this influential group of MPs has concluded that the decision to adopt ‘all lane running’ on all future smart motorways may be premature. The safety of motorists must come first and therefore new designs need to be trialled for sufficiently long to demonstrate their safety before they are introduced more widely. This was precisely the approach adopted by the Highways Agency (now Highways England) when a smart motorway with a dynamic hard shoulder was first introduced on the M42.“The message to government and to Highways England is clear – we should apply the principles that have proven to be safe on smart motorways such as the M42 until such time as the evidence exists to show all lane running is as safe as conventional motorways with a hard shoulder, and as smart motorways with a dynamic hard shoulder which only open to traffic as a running lane when the extra capacity is needed.”