نتایج جستجو برای: important transportation routes

تعداد نتایج: 1232000  

Journal: :Operations Research 2006
Jean-François Cordeau

In the dial-a-ride problem, users formulate requests for transportation from a specific origin to a specific destination. Transportation is carried out by vehicles providing a shared service. The problem consists of designing a set of minimum cost vehicle routes satisfying capacity, duration, time window, pairing, precedence and ride time constraints. This paper introduces a mixed-integer progr...

2009
Daniel Delling Thomas Pajor Dorothea Wagner

Recent research on fast route planning algorithms focused either on road networks or on public transportation. However, on the long run, we are interested in planning routes in a multi-modal scenario: we start by car to reach the nearest train station, ride the train to the airport, fly to an airport near our destination and finally take a taxi. In other words, we need to incorporate public tra...

2005
Joan SERRAS

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...

2008
Efrat Blumenfeld-Lieberthal

This paper presents an analysis of the topology of transportation networks within different systems of cities. Urban entities and their components are complex systems by their nature; there is no central force that affects their spatial structure. Thus, we study transportation networks within different countries as complex networks. Based on the above, we consider cities as nodes, while direct ...

In developing countries, whereas the urban bus network is a major part of public transportation system, it is necessary to try to find the best design and routing for bus network. Optimum design of school bus routes is very important. Non-optimal solutions for this problem may increase traveling time, fuel consumption, and depreciation rate of the fleet. A new bus routing problem is presented i...

2015
Amanda Sosa Kevin McDonnell Ger Devlin Robert Lundmark

In Ireland, truck transport by road dominates and will remain the main transportation mode of biomass. Cost efficiency and flexibility of forest transport can be typically improved by optimising routes. It is important to know every process and attributes within the workflow of roundwood transport. This study aimed to analyse characteristics of timber trucking in Ireland, and to estimate the le...

Dmitrichenko, Nikolay, Khrutba, Viktoriia, Khrutba, Yuliia, Spasichenko, Oksana,

The transport system of many Ukrainian cities does not meet the EU standards and requirements. There is a need to improve urban transport networks, to use transport potential efficiently on the basis of environmental logistics and to improve environmental safety as one of the principles of sustainable transport development. The systems model to create an ecologically safe logistics system of pu...

Journal: :Racic : Rab construction research 2021

In Pekanbaru City, students' trips to and from school tend use private vehicles, be it motorbikes or those delivered by parents, so the available urban transportation is less attractive. Almost 75% of students motorbikes, this situation can certainly affect student safety. This seen number accidents in 2017 which placed profession as a victim 2nd position. Therefore, necessary plan safe, comfor...

2010
Ravi Kanbur Geoffrey K. Turnbull

The paper presents a theoretical model that seeks to answer the question of why former squatter settlements tend to upgrade/redevelop at a slower pace than otherwise similar settlements originating in the formal sector. We argue that squatter settlers’ initial strategy to access urban land creates a ‘legacy effect’ that curtails settlement upgrading possibilities even after the settlements are ...

2011

It is commonly believed that Adventure-based Counseling (ABC) training is intended for young people who are active and energetic. The St. James’ Settlement (a NGO) in Hong Kong, however, believes that such training can also have positive effects on the young olds (individuals aged 50-65). A group of young old trainees was recruited from the community to help implement related activities to elde...

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