Abstract

ustainable transport has become a major policy concern in recent years. The term suggests a need to consider transport in a comprehensive perspective including the well-being of both present and future generations, and taking environmental, social and economic issues into account. Indicators in forecasting and tracking the performance of transport systems increasingly guide sustainable transport policy making. This review explores the implications of the "sustainable transport" concept and how it can be made operational with indicators. A number of indicator systems are reviewed, and some strengths and weaknesses are highlighted with regard to the support they provide for sustainable transport development. Document type: Part of book or chapter of book

Abstract

In order to address the Signal Setting Design at urban level two main approaches may be pursued: the coordination and the synchronisation approaches depending on the steps considered for the optimisation of decision variables (two steps vs. one step). Furthermore, in terms of objective functions mono-criterion or multi-criteria may be adopted. In this paper the coordination approach is implemented considering the multi-criteria optimisation at single junctions and mono-criterion optimisation at network level whereas the synchronisation is implemented considering the mono-criterion optimisation. The main purpose of the paper is the evaluation of the performances of two strategies not only considering indicators such as the total delay, the queue length etc. but also considering other indicators such as the emissions and the fuel consumption. The methodological framework is composed by three stages: (i) the decision variables (green timings and offsets) computation through optimisation methods; (ii) the implementation of optimal signal settings in a microscopic traffic flow simulator (“Simulation of Urban MObility”-SUMO); (iii) the estimation of emissions and fuel consumption indicators. Document type: Part of book or chapter of book