All lane running: second report of Session 2016-17

In All Lane Running, the hard shoulder is permanently converted into a running lane. This is a change from previous designs, where the hard shoulder was only used during peak periods or during congestion. While the case for increasing motorway capacity is clear, the earlier forms of smart motorway have, by Highways England’s own analysis, a lower risk profile than All Lane Running. The type of scheme used on the M42 has a track record of safety and performance, and it is perverse for the DfT to continually lower the standard of the smart motorway specification, while presenting such changes as a logical next step. The permanent removal of the hard shoulder is a dramatic shift from previous smart motorway schemes. There is no one-size-fits-all solution and each proposal needs to be justified on its own terms. The M42 Active Traffic Management Pilot cost £9.0 million per mile to construct. While it is clear that this is more expensive than the cost of using an All Lane Running configuration, it remains less expensive than traditional motorway widening. Unlike All Lane Running, it maintains emergency use of the hard shoulder using infrastructure that creates a controlled environment. If traditional motorway widening has been rejected as too expensive, then it is the model of the M42 pilot that should be considered the basis of future schemes, rather than a permanent conversion of the hard shoulder into a running lane, an ever-decreasing frequency of emergency refuge areas, and newly introduced hazards impeding emergency and recovery service access to incidents. The Department should not proceed with a major motorway programme on the basis of cost savings while major safety concerns continue to exist.


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Filing Info

  • Accession Number: 01604795
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Jul 18 2016 4:47PM