In the real world, cities exist because of external economies associated with the geographic concentration of firms within a city. Of course, such a geographic proximity with input providers and consumers, would at first reduce transportation costs. But why cities, information cities, i.e. large agglomerations of people and economic activity emerge in the virtual world? In the Internet, transpo...

New approaches are required to analyse very large land-use transportation systems in which millions of people make millions of trips each day. New computer technology has enabled packages that model very large transportation systems. Some of these models are reviewed and it is concluded that the TRANSIMS system developed at Los Alamos National Laboratory has the best combination of desirable ch...

In 2012, a survey was carried out in 8 French cities to study noise annoyance due to combined transportation noise sources. Both partial and total annoyances were measured. The current paper will first focus on partial noise annoyance due to railway traffic measured in 6 French cities. In order to predict annoyance due to single transportation noise sources, the European Commission recommends t...

New approaches are required to analyse very large land-use transportation systems in which millions of people make millions of trips each day. New computer technology has enabled packages that model very large transportation systems. Some of these models are reviewed and it is concluded that the TRANSIMS system developed at Los Alamos National Laboratory has the best combination of desirable ch...

The aim of the Traveling Salesman Problem (TSP) is to find the cheapest way of visiting all elements in a given set of cities and returning to the starting point. In solutions presented in the literature costs of travel between nodes (cities) are based on Euclidean distances, the problem is symmetric and the costs are constant. In this paper a novel construction and formulation of the TSP is pr...

centralizing and using proper transportation facilities cut down costs and traffic. hub facilities concentrate on flows to cause economic advantage of scale and multimodal transportation helps use the advantage of another transporter. a distinctive feature of this paper is proposing a new mathematical formulation for a three-stage p-hub location routing problem with simultaneous pick-ups and de...

Cities in developing countries like India are facing some of the same concerns that North American cities are: congestion and urban growth. However, the concern in cities like New Delhi, India is that this growth is far more rapid as both urbanization and motorization are ongoing processes that have not yet peaked. Furthermore air quality in major Indian cities is now becoming a major concern w...

Cities play a vital role in promoting economic growth and prosperity. The development of cities largely depends upon their physical, social, and institutional infrastructure. In this context, the importance of intraurban transportation is paramount. This article provides an overview of urban transport issues in India. Rather than covering every aspect of urban transportation, it primarily focus...

of locating supply points optimally with respect to transportation costs i s given. Although the algorithm may fail to converge to an optimal solution, repeated application with judicious selections of alternative starting values will assure a good, i f not optimal, solution. The algorithm has been tested and some sample results are included. The location of factories, warehouses-and supply poi...

The Beijing-Tianjin-Hebei area faces a severe fine particulate matter (PM2.5) problem. To date, considerable progress has been made toward understanding the PM2.5 problem, including spatial-temporal characterization, driving factors, and health effects. However, little research has been done on the dynamic interactions and relationships between PM2.5 concentrations in different cities in this a...