Read e-book online Intelligent Freeway Transportation Systems: Functional PDF

By Robert Gordon

ISBN-10: 1441907327

ISBN-13: 9781441907325

Intelligent highway Transportation platforms: practical Design specializes in the effective use of assets within the layout of ITS. the writer discusses the foundations of most sensible down layout beginning with goals and necessities, and offers information for the improvement and assessment of practical layout choices in accordance with expense effectiveness rules. This booklet describes how transportation making plans rules and site visitors diversion rules relate to practical ITS gadget decisions and gear destinations. Methodologies for translating pursuits to practical gadget varieties are supplied. program elements to spot gadget deployment densities (e.g. variety of detectors in line with mile) as a functionality of site visitors stipulations are supplied, as are types for comparing the advantages of layout choices in response to site visitors stipulations. Methodologies for the simplest placement of CCTV cameras and changeable message symptoms are mentioned. layout information contains the subsequent functions:

  • ITS measures for non-recurrent congestion that enhance incident clearance time;

  • Strategies to supply incident info to motorists and their benefits;
  • How ITS offers with info to motorists to help in lowering recurrent congestion;
  • Ramp metering thoughts, their advantages and constraints;
  • Functional layout of communications for ITS;
  • Transportation administration middle functions.

Methodologies for the overview of ITS advantages to check replacement designs and help in the choice of the simplest substitute also are provided.

Intelligent highway Transportation platforms: sensible Design is suitable for engineers and choice makers engaged within the scoping and initial layout of ITS in addition to for collage classes in this topic. P>

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Extra info for Intelligent Freeway Transportation Systems: Functional Design

Example text

Volume to capacity ratio upstream of incident the absence of an incident. The practical evaluation of ITS improvements requires a relatively simple model that embeds these variations. 4 describe an approach to the development of such a model. 4 requires a value for the blockage time and severity (capacity reduction) of a representative incident. It also requires a value for the frequency of the incident (number of incidents per million vehicle miles of travel). 5 shows a model that provides some of the required information.

Since the user is the ultimate judge of the perception of ITS effectiveness and value, the system designer must consider the factors that the user deems important. While these factors may be difficult to estimate on a prospective basis, previous studies provide some indication as to how user satisfaction will be rated. While Chaps. 5 though 8 discuss user satisfaction for different ITS treatments, some general issues are discussed below. ITS treatments such as motorist information and motorist service patrols are generally well received by the public because motorists feel that these treatments improve their trip reliability and their sense of control [16].

Rubber necking” also known as “gawking”), leading to non-recurrent congestion and reduced reliability of the entire transportation system [1]. ITS techniques to reduce the effect of non-recurrent congestion include reducing the time to clear an incident (Chap. 4 and Chap. 5). 1 Diversion Decisions by Motorists The motorist normally selects a route based on the comparative utility (travel time and other factors) of alternative route choices. Traffic assignment models estimate the choices by user class.

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Intelligent Freeway Transportation Systems: Functional Design by Robert Gordon


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