By Robert Gordon
Intelligent highway Transportation platforms: useful Design makes a speciality of the effective use of assets within the layout of ITS. the writer discusses the rules of most sensible down layout beginning with pursuits and specifications, and gives information for the improvement and overview of sensible layout possible choices based on fee effectiveness ideas. This booklet describes how transportation making plans ideas and site visitors diversion rules relate to sensible ITS equipment choices and gear destinations. Methodologies for translating targets to useful equipment kinds are supplied. program components to spot machine deployment densities (e.g. variety of detectors in line with mile) as a functionality of site visitors stipulations are supplied, as are versions for comparing the advantages of layout choices in line with site visitors stipulations. Methodologies for the easiest placement of CCTV cameras and changeable message indicators are mentioned. layout advice comprises the subsequent functions:
- ITS measures for non-recurrent congestion that increase incident clearance time;
- Strategies to supply incident details to motorists and their benefits;
- How ITS offers with details to motorists to help in decreasing recurrent congestion;
- Ramp metering options, their merits 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 structures: sensible Design is acceptable for engineers and determination makers engaged within the scoping and initial layout of ITS in addition to for college classes in this topic. P>
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Extra resources for Intelligent Freeway Transportation Systems: Functional Design
Example text
Values for these measures may be obtained by simulation techniques or inferred from evaluations performed by other ITS projects. Maccubbin et al. [19] provides a compilation of ITS benefits. 6. 6 Multi-attribute utility values for ITS alternatives example Alternative ITS project classes (S) Multi-attribute utility value (MUS) 1. Improved incident clearance 2. Restrictive ramp metering 3. Non-restrictive ramp metering 4. Motorist information 5. Motorist service patrol 6. Real time on-board and transit stop information 7.
Most traffic management centers manage the provision of motorist information by means of operating procedures. These procedures reflect the policies of the agency and contain message structure guidelines as well as the circumstances that require messages. Dudek [9] provides a comprehensive discussion of these factors and a number of examples of policy statements for various aspects of message development and changeable message sign operation. The example policy for diversion using changeable message signs (CMS) is: When incidents occur that do not require the full closure of the roadway and it is desirable to divert traffic from the freeway, CMS messages shall not divert motorists to specific alternative routes unless positive guidance is available along the alternative route in the form of a) guide signs and/or trailblazers to the major destination, or b) law enforcement or traffic control personnel positioned at critical locations along the alternative route to control and guide traffic.
Levinson D et al (2004) Measuring the equity and efficiency of ramp meters. Brand D (2004) Benefit measures, values, and future impacts of ITS. In: Gillen D, Levinson D (eds) Assessing the benefits and costs of ITS. Wang Z, Walton CM (2008) A Multi-attribute utility theory approach for ITS planning. Levine J, Underwood SE (1996) A multiattribute analysis of goals for intelligent transportation systems planning. Maccubin RP et al (2003) Intelligent transportation systems benefits and costs: 2003 update.