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State dependent ramp metering control of motorway bottlenecks using non-linear pole assignment.

Taylor, C. James and Chotai, Arun (2009) State dependent ramp metering control of motorway bottlenecks using non-linear pole assignment. In: 12th IFAC Symposium on Control in Transportation Systems. .

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Ramp Metering (RM) utilises traffic lights at the on-ramp entrances to limit access to the main carriageway of the motorway, in order to maintain flow close to capacity. In comparison to linear design, adaptive or predictive control systems can offer improved performance, albeit with the disadvantage of increased complexity, which can be prohibitive in the context of RM. By contrast, the present article develops a state dependent parameter (SDP) approach to traffic modelling and an associated non-linear pole assignment RM algorithm that is relatively straightforward to implement. Although the SDP model describes occupancy, its parameters are functionally dependent on other variables in the system, such as average velocity. In this manner, SDP models capture the time varying and non-linear dynamics of motorway flows but can, nonetheless, be estimated off-line. The paper illustrates the approach using telemetered measurements from near Southampton in the UK. Algebraic solutions to the control problem are similarly derived off-line and evaluated on-line using a macroscopic simulation model.

Item Type: Contribution in Book/Report/Proceedings
Additional Information: 2-4 September 2009, Redondo Beach, California, USA
Uncontrolled Keywords: motorway ramp metering ; state dependent parameter ; non-linear pole assignment
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: Faculty of Science and Technology > Engineering
Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 33447
Deposited By: Dr C. James Taylor (Engineering)
Deposited On: 18 May 2010 13:58
Refereed?: No
Published?: Published
Last Modified: 10 Apr 2018 02:10
Identification Number:

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