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- W591790608 abstract "This paper will discuss how the provision of intelligent transportation system (ITS) equipment for management of motorways has become commonplace throughout Europe. Installations typically comprise measures to manage mainline traffic streams in an attempt to avoid flow breakdown, with additional measures to enhance capacity or restrict excessive traffic volumes from joining the mainline under congested or near-congested conditions. Over the past 15 years, a general consensus has emerged regarding the role and functions of ramp metering and access control on motorways, and this has supported the deployment of numerous systems throughout the world. Likewise, the benefits of hard shoulder running can be easily established. For variable speed limits (VSL), the discussion is somewhat less certain. United States (US) deployments have focused on objectives to improve safety, whereas United Kingdom (UK) systems have a stated objective to improve capacity as well as safety. A research review highlights evidence to suggest that it can be extremely difficult to generate journey time benefits from a VSL system, and as such key benefits will comprise safety improvements that result from a general reduction in stop-start driving. This assertion is borne out by results of the evaluation of the M25 in London, which highlighted quite limited journey time benefits but a notable safety improvement. This evidence seems to contradict the general consensus that reducing the incidence of flow breakdown can protect carrying capacity of a motorway, given that flow breakdown itself can reduce carrying capacity locally by up to 15%. As such, removing such occurrences is critical in avoiding the onset of such bottlenecks. The current paper examines the impact of VSL, ramp metering and hard shoulder running as individual strategies and progresses to understand how they interact with each other. The paper uses microsimulation techniques to understand vehicle behavior in various environments and the impact of various combinations of strategies." @default.
- W591790608 created "2016-06-24" @default.
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- W591790608 date "2010-01-01" @default.
- W591790608 modified "2023-09-23" @default.
- W591790608 title "Motorway Management Techniques" @default.
- W591790608 hasPublicationYear "2010" @default.
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