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Nagashima Y.,Infocommunications and Social Infrastructure systems R and nter | Hattori O.,Infocommunications and Social Infrastructure systems R and nter | Kobayashi M.,Systems and Electronics Division
SEI Technical Review | Year: 2014

Originally, traffic control has been aimed at the safety and comfortableness of transportation. Recently, there has been a growing demand for reducing CO2 emissions by intelligently controlling traffic signals depending on traffic conditions. However, this requires many detectors and high installation costs. To address this problem, we have focused on the probe data collected by vehicles through GPS or other devices. We have developed a signal control system that calculates consecutive spatial traffic information (spatial data), such as queue length, based on the probe data. In the simulation experiments conducted by the UTMS (Universal Traffic Management System) Society of Japan*1, we demonstrated this system and presented the possibility of reducing the number of detectors. Source

Washimi K.,Systems and Electronics Division | Kuramoto M.,Infocommunication and Social Infrastructure Systems R and nter | Hayasaki T.,Advanced Automotive Systems R and nter
SEI Technical Review | Year: 2014

Traffic conditions in Japan have been improved through the widespread use of traffic control systems, including signal controllers, in the late 1960s and the electronic toll collection systems in the 1990s. Currently, efforts for further reduction of traffic congestion and accidents have been made by using intelligent transport system (ITS) technology that wirelessly connects vehicles to vehicles and vehicles to infrastructure. ITS technology has now further advanced through the emergence of advanced infrared beacons. In emerging economies, on the other hand, there have been serious traffic congestion issues and increased road accidents due to rapid growth. ITS and its wireless communication technology are expected to be used in building effective signal control systems at low cost. To meet these global expectations, Sumitomo Electric Industries, Ltd. will continue to work on the development of ITS technology, drawing on its wide ranging expertise. Source

Kishimoto K.,Systems and Electronics Division | Jinno M.,Systems and Electronics Division
SEI Technical Review | Year: 2014

In Japan, as part of the Intelligent Transport System (ITS), research, development and deployment of the Universal Traffic Management System (UTMS) have been promoted for the purposes of environmental preservation, safety support and traffic congestion reduction. For the application of UTMS, infrastructure-to-vehicle (I2V/V2I) and interinfrastructure (I2I) communications are vitally important. As one of the possible solutions to these needs, we are studying the use of the 700 MHz radio band. This paper reports on our research and development for the practical application of UTMS using the 700 MHz band for I2V/V2I, I2I and vehicle-to-vehicle (V2V) communications. We have focused particularly on I2I communications for enhanced traffic signal control. Source

Hayama K.,Sumitomo Electric | Shiranaga H.,Systems and Electronics Division | Miyake K.,Sumitomo Electric | Taniguchi Y.,Systems and Electronics Division
SEI Technical Review | Year: 2014

Infrared beacons have been installed on roads since the beginning of the 1990s, many of which are now reaching the point when they need to be replaced. For the replacement, we have developed an advanced infrared beacon that has increased communication capacity. It enables upgraded traffic signal control and provides detailed traffic information by collecting tracking data of vehicles. The beacon can be also used for the Signal Information Drive System (SIDS), which promotes eco driving by providing drivers with the signal information on the route. This paper outlines the advanced infrared beacon, the development challenges and our manufacturing efforts. Source

Yamamoto H.,Systems and Electronics Division | Kato T.,Systems and Electronics Division | Tani H.,Sumitomo Electric | Koreeda Y.,Sumitomo Electric | And 3 more authors.
SEI Technical Review | Year: 2011

A Novel image processing vehicle detector has been developed and released to the market. We have resolved some defects seen in conventional detectors, most of which are caused by weather changes or lack of resolution. We have adopted two approaches: the improvement of algorithms for vehicle detection, and the use of a high resolution camera. These improvements have enabled the product to provide stable performance all day throughout the year and also to detect vehicles far from the camera more precisely than conventional NTSC cameras. Our product can be used not only as a traditional traffic flow detector but also as a next-generation detector such as one for the driving safety support system (DSSS). In addition, the product is upgradable due to its hardware and software scalability. Source

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