Author(s)

S. Thompson-Clement & M. Taylor

Abstract

The Cabal traffic signal timing optimisation model was designed to encompass a wide variety of traffic signal operational objectives reaching beyond the narrow limitations of increased throughput of vehicles by reducing delays, stops and queue length to decreasing vehicle emissions and noise pollution; and increasing consideration for pedestrian, bicycle and transit traffic. Moreover, Cabal was designed so that the levels of consideration given to each of these objective factors could be varied dependent on the desired outcome for the signal timing scheme. This paper describes the design of Cabal and how it utilises flow predictions, pollution levels, meteorological conditions, accident histories and current demand to optimise the timings for an isolated signalised intersection. 1 Introduction

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