Traffic information service plays an important role in one’s daily life. However, traffic information processing is very complicated because of its dynamic, cooperative and distributed features. This chapter presents the Service and Monitoring Oriented Traffic Information Grid. In this system, it is a remarkable characteristic to provide real-time, dynamic information services for travelers and...

The curfew planning problem is to design an annual timetable for railway track maintenance teams. Each team is capable of handling certain types of repairs and replacement jobs. The jobs are combined into a set of projects according to their locations and types. The timetable shows which project should be worked on by each team on a weekly basis throughout an entire year. Our objective is to de...

Japan’s Intelligent Transport Systems (ITS) project for safe and comfortable transpor­ tation is steadily progressing. To improve safety, information technology (IT) should be applied to most of Japan’s traffic environments. In response, the Fujitsu Group has installed IT equipment into motor vehicles in line with a government policy of using IT to bring transportation systems fully into the 21...

doi:10.1017/S1049023X12000544 As traffic accidents occupy center stage in injury discussions, Forsberg and colleagues’ report ‘‘One hundred years of railway disasters and recent trends’’ made interesting reading. With trains traveling at higher and higher speeds, the authors correctly recommend injury prevention and safety mechanisms to decrease the risk of mass-casualty events. The robust Emer...

In this paper we present a concept of new architectural model consisting of multiple loop delay to increase the throughput. The simulated behavior of an optical node has been realized by using an n x m optical switch and recirculating optical delay lines. This investigation infers the scaling behaviors of the proposed architecture to maintain efficient use of the buffer under Poisson traffic lo...

The research on network traffic classification has recently become very active. The research community, moved by increasing difficulties in the automated identification of network traffic, started to investigate classification approaches alternative to port-based and payload-based techniques. Despite the large quantity of works published in the past few years on this topic, very few implementat...

Network traffic statistics from operators can provide a good overview on world-wide network usage. In the past, Internet2 provided statistics of traffic transferred in one of their networks. These statistics have been a valuable source of information for researchers and operators. However, Internet2 discontinued this project in April 2010 and, to the best of our knowledge, there is no other pro...

Future ATM networks will be required to support a plethora of services, transaction types and cell sequence behaviors with performance guarantees. Before this goal can be realized, however, some basically problems related to bandwidth allocation and traffic control in the ATM layer must be resolve. Such problems will in all likelihood defy solution as long as they studied in isolation without a...

High speed computer and telephone networks carry large amounts of data and signalling traffic. The engineers who build and maintain these networks use a combination of hardware and software tools to monitor the stream of network traffic. Some of these tools operate directly on the live network; others record data on magnetic tape for later offline analysis by software. Most analysis tasks requi...

OBJECTIVE This study evaluated the prevalence of, and the risk factors for, obstructive sleep apnea syndrome (OSAS) among Brazilian railroad workers. METHODS Male railroad workers (745) from a railway company in Brazil were analyzed after responding to questionnaires about their demographics, sleep habits, excessive daytime sleepiness (Epworth), and the likelihood of having apnea (Berlin). We...