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Proportional-Integral-Plus (PIP) co-ordinated ramp metering control of motorway networks.

Taylor, C. James and Young, Peter C. and Chotai, Arun and Whittaker, J. (1998) Proportional-Integral-Plus (PIP) co-ordinated ramp metering control of motorway networks. In: DACCORD Workshop on Advanced Motorway Traffic Control, 1998-12-10, Lancaster University, UK.

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Abstract

This paper discusses a number of research areas concerned with dynamic traffic management, including the simulation, forecasting and automatic control of motorway traffic flows. The research is based on detailed non-linear Statistical Traffic Model (STM) simulations of motorways in The Netherlands. However, we have found that the behaviour of the traffic system can be approximated by simple, reduced order linearised time variable parameter transfer function models, that are identified and recursively estimated directly from simulated or measured data. Such linear models are employed in a Proportional-Integral-Plus, Linear Quadratic (PIP-LQ) control system for multivariable ramp metering (i.e. traffic lights on the on-ramp entrances). The paper also proposes a novel non-parametric approach to the estimation of the ubiquitous non-linear fundamental traffic diagram. This technique successfully handles the discontinuity between free flow and congested conditions and so provides an objective estimate of the required control set point.

Item Type: Conference or Workshop Item (Paper)
Journal or Publication Title: DACCORD Workshop on Advanced Motorway Traffic Control
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: Faculty of Science and Technology > Lancaster Environment Centre
Faculty of Science and Technology > Engineering
ID Code: 33474
Deposited By: Dr C. James Taylor (Engineering)
Deposited On: 19 May 2010 11:10
Refereed?: No
Published?: Published
Last Modified: 24 Jan 2014 06:13
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/33474

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