Full time through junction running simulation study

Cyriel Diels, A. Dale, R. Robbins, T. Rees, I. Summersgill

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UK motorways are experiencing growing congestion problems as the volume of traffic increases. Many innovative solutions are being considered within the current network to try and tackle this problem. One scheme that has been created and already implemented in particular motorway networks is the use of the hard shoulder as an additional running lane. The hard shoulder running (HSR) scheme has created challenges in itself, and therefore further trials have been required to understand the impact on road users. This scheme for increasing network capacity relies on the opening and closing of the hard shoulder when needed. For example, opening the hard shoulder when traffic is particularly congested or closing the hard shoulder if a breakdown has occurred. This study seeks to understand driver comprehension of hard shoulder running when driving through and entering/exiting junctions. It is vital that drivers are aware of the status of the lanes and that it does not cause confusion, as this could potentially lead to an accident. The aim of this study is to investigate drivers’ responses to a simulated Full Time Through Junction Running (FT TJR) scheme under conditions of high traffic density. This is to gain an overall understanding of how drivers are likely to behave in schemes of this nature, and to enable the creation of a safe and comprehensive design. The concept needs to be viewed by the motoring public as useable and a positive experience to ensure the additional network capacity is utilised correctly.
Original languageEnglish
Place of PublicationWokingham, Berkshire
PublisherTransport Research Laboratory
ISBN (Print)9781908855824
Publication statusPublished - 2010


  • motorways
  • hard shoulder running
  • managed motorways
  • traffic flow


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