Development of the All Lane Running Concept in England

This paper presents the development of the concept of Smart Motorways All Lane Running (ALR). It will describe the ‘drivers’ and examine how the theoretical analysis was able to support the investment decision. The key challenges associated with the development of ALR were: i) To demonstrate that ‘Adequate Guidance’ has been provided – ensuring that drivers are presented with enough information so that they comply with the information that they are observing; ii) Road Worker Safety – ALR had to demonstrate that road worker safety could meet a SFAIRP (So Far As Is Reasonably Practicable) test and also was no worse than the before case /data; iii) That road user safety could be maintained across all identified (key) groups; iv) That acceptably safe and practicable Operating and Maintenance Regimes could be developed, agreed and implemented; iv) That satisfactory mitigations were in place for all significant / top scoring hazards; v) Production of an evidential trail to satisfy a barrister that in the event of any subsequent potential road death investigation, resulting from the implementation of the ALR concept, that there were no management failings in the assessment of risk that had been carried out; and vi) A comprehensive review of data from the All-Purpose Trunk Roads (APTR)/Dual 3- lane Motorway (D3M) was undertaken to document supporting theoretical evidence. The paper will chart the development of the concept from inception to the first implementation and provide early evidence of the proving of the model on the English strategic road network.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos;
  • Pagination: 12p
  • Monograph Title: Proceedings of the 25th World Road Congress - Seoul 2015: Roads and Mobility - Creating New Value from Transport

Subject/Index Terms

Filing Info

  • Accession Number: 01679901
  • Record Type: Publication
  • ISBN: 9782840604235
  • Report/Paper Numbers: 0437
  • Files: TRIS
  • Created Date: Jul 30 2018 9:12PM