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Transit Priority Oriented Signalized Junctions - Design and Realisation in Geneva, Switzerland

Tan, Jaubert Jianan

Public transport offers alternative modes of transport to the private motor car. It can relieve traffic congestion and reduce air pollution from road transport. For these reasons, the idea of development of advanced public transport is well accepted in Switzerland. Each year from 2004, there is a new tramway built in Geneva. Extension of tramway will be continued in the coming years. To make public transport more reliable (less delay and timetable respecting), the transit priority strategy (such as transit lane concept and transit priority treatment measures) is always applied at signalised junctions. A signalised junction where the transit movement may have favourable green (for example, green will be given to a transit movement when it arrives at junction) is a transit priority oriented signalised junction. It is a type of intelligent signalised junction. Based on more than ten year's experiences over 70 intelligent signalised junctions' design and realization in Geneva, the author presents in this paper the main steps of a transit priority oriented signalised junction's design and its realization. The following main steps are discussed: junction control strategy study; determination of control equipment; junction detail signal design; controller programming and test, analyse of recording data and evaluation of the effectiveness of the transit priority signal control. The development of useful tools for intelligent signalised junction design and a new signal group oriented traffic controller are also described. Some further developments and researches are suggested.