Citation

Li Y, Chow AHF. Transp. Plann. Tech. 2015; 38(1): 94-110.

Copyright

(Copyright © 2015, Informa - Taylor and Francis Group)

DOI

10.1080/03081060.2014.976982

PMID

unavailable

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.