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Automatic Control of Variable Message Signs in Aalborg

學生 .莊靖玟

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Purpose

This paper presents the design, implementation, and partial evaluation work performed by a European consortium for the development of VMS information and guidance system in the city of Aalborg, Denmark.

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Reference

Three possible methodologies applicable to VMS control in highway networks.

(Messmer and Papageorgiou ,1994)

These are (with decreasing degree of complexity) optimal control methods employing on-line optimization, central state feedback control and decentralized feedback control.

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Network Description and Operational Objectives

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Automatic control strategy

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Automatic control strategy

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Automatic control strategy

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Automatic control strategy

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Automatic control strategy

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Automatic control strategy

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Simulation studies

The presented VMS control strategy was tested under a number of different scenarios:

Scenarios1/2Scenarios3/4Scenarios5/6Scenarios7/8Scenarios9/10Scenarios11/12

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Simulation studies

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Simulation studies

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Simulation studies

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Simulation studies

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Simulation studies

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Simulation studies

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Simulation studies

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Simulation studies

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Simulation studies

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Simulation studies

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Simulation studies

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Simulation studies

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Implementation concept

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Conclusions

Simulation studies demonstrate the potential improvements achievable with this kind of control measures and control strategies.

The implementation concept and first field results are outlined.