Optimisation of motorway operations via ramp metering and variable speed limits

Ying Li and Andy H.F. Chow

Transportation Planning and Technology, 2015, vol. 38, issue 1, 94-110

Abstract: This paper presents a modelling and optimisation framework for deriving ramp metering and variable speed control strategies. We formulate the optimal control problems aiming to minimise the travel delay on motorways based upon a macroscopic cell transmission model of traffic. The optimal ramp metering optimisation is formulated as a linear programming (LP) while the variable speed control problem is formulated as a mixed integer LP. The optimisation models are applied to a real scenario over a section of M25 motorway in the UK. This paper also includes various analyses on the sensitivity of the optimal control solutions with respect to different network configurations and model assumptions.

Date: 2015
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DOI: 10.1080/03081060.2014.976982

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