NECTAR (Network on European Communications and Transport Activities Research) is an international scientific, interdisciplinary association with a network culture. Its primary objective is to foster research collaboration and the exchange of information between experts in the fields of transport, communication and mobility. NECTAR members study the behaviour of individuals, groups and governments within a spatial framework. They bring a wide variety of perspectives to analyse the challenges facing transport and communication, and the impact these challenges have on society at all levels of spatial aggregation. This series acts as a companion to, and an expansion of, activities of NECTAR. The volumes in the series are broad in their scope with the intention of disseminating some of the work of the association. The contributions come from all parts of the world and the range of topics covered is extensive, reflecting the breadth and continuously changing nature of issues that confront researchers and practitioners involved in spatial and transport analysis.