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    <title>Transport Research International Documentation (TRID)</title>
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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
    <docs>http://blogs.law.harvard.edu/tech/rss</docs>
    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>Transport Research International Documentation (TRID)</title>
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    <item>
      <title>A Study on Application of Uplink Data Collected via Infrared
Beacons to Traffic Management</title>
      <link>https://trid.trb.org/View/1324626</link>
      <description><![CDATA[In Japan infrared beacons have been widely installed since early 1990s with approximately 54,000 units on arterial roads. Through the two-way communication between infrared beacons and vehicles equipped with onboard units, Traffic Control Center collects information such as vehicle identification numbers and travel time. The information is called uplink data and is expected to contribute to research and development of traffic management. However, studies on the status of collection and practical application of it have been quite few. In this paper, the authors examine the statistics of collecting uplink data for long periods. Moreover, they validate travel time estimated from this data.]]></description>
      <pubDate>Mon, 29 Sep 2014 10:02:55 GMT</pubDate>
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      <title>Pattern Analysis of Road Traffic Information for Utilization in VICS-FM Multiplex Broadcasting</title>
      <link>https://trid.trb.org/View/1322366</link>
      <description><![CDATA[The Vehicle Information and Communication System (VICS) provides road traffic information (VICS information) to road and traffic managers and to drivers. The VICS Center uses FM multiplex broadcasting to distribute VICS information, but since there are limitations on the bandwidth that can be used in FM multiplex broadcasting, information of lower priority is deleted when necessary. At present, these priorities are the same across the board under all circumstances. The aim is to provide drivers with more useful information in the future by defining a number of patterns for priority control tables that are used in broadcast program editing, and switching among these patterns according to actual conditions. In this way, useful information applicable to conditions could be provided. This paper reports on the first steps toward that aim in the form of results from analysis of road traffic information trends from spatial and temporal perspectives, and the possibilities for making multiple priority control tables.]]></description>
      <pubDate>Fri, 26 Sep 2014 14:29:20 GMT</pubDate>
      <guid>https://trid.trb.org/View/1322366</guid>
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    <item>
      <title>Measure Research for Realization of Sustainable Traffic Society by ITS</title>
      <link>https://trid.trb.org/View/1322388</link>
      <description><![CDATA[Japanese intelligent transportation systems (ITS) advancements have greatly contributed to the solution of road traffic problems such as traffic accidents and congestion. The success of ITS is a product of governmental initiative and cooperative relationships between the industrial, governmental, and academic sectors. Their efforts have popularized in-vehicle units of Japanese mission critical systems over the last twenty years, with the result that the car navigation systems, Vehicle Information Communication System (VICS) and Electronic Toll Collection system (ETC) have been put to use in over 30 million and 50 million vehicles, respectively. As well, ITS has become of major importance in government road traffic policies. The authors think that the future direction which Japanese ITS should aim at is not only enriching Japanese mission critical systems, but also realizing sustainable traffic society in a local area. For that purpose, the authors think it important to make a mechanism in which citizens can customize ITS according to their needs and the administration needs of a local area. This paper proposes two kinds of ITS promotion measures for the advancement of future Japanese  ITS. One is a measure which use ITS more  effectively in governmental  ITS strategies and policies. Another is a measure which promotes the  introduction  and utilization of ITS smoothly in a local area.]]></description>
      <pubDate>Fri, 26 Sep 2014 14:29:17 GMT</pubDate>
      <guid>https://trid.trb.org/View/1322388</guid>
    </item>
    <item>
      <title>Strategic Plan for Disaster Information Services based on VICS</title>
      <link>https://trid.trb.org/View/1322663</link>
      <description><![CDATA[This paper is an overview of the  “Strategic Plan for Realization of Disaster Information Services based on VICS,” prepared by the Vehicle Information and Communication System (VICS) Center in cooperation with the University of Tokyo based on the lessons learned from the Great East Japan Earthquake. The Strategic Plan includes strategies up through approximately the year 2030 aiming at realizing information services that will make full use of information and communications technologies in coping with disasters. The Strategic Plan comprises: Lessons learned from the Great East Japan Earthquake;  Vision for  the VICS Disaster  Information Service; Services to be  achieved; Technical and institutional issues; and Roadmap. It is hoped that preparing and releasing this Plan will serve as an opportunity to bring about agreement and efforts on the part of a wide range of relevant public and private sector institutions, making it possible to minimize the damage from future anticipated major disasters, torrential rainstorms, etc.]]></description>
      <pubDate>Fri, 26 Sep 2014 14:24:37 GMT</pubDate>
      <guid>https://trid.trb.org/View/1322663</guid>
    </item>
    <item>
      <title>Research on Future Provision of Information Infrastructure for Road Traffic Information to Complement FM Multiplex Broadcasting</title>
      <link>https://trid.trb.org/View/1322106</link>
      <description><![CDATA[The Vehicle Information and Communication System (VICS) Center relies on FM multiplex broadcasting and beacons to provide various kind of traffic information to vehicles in Japan equipped with car-navigation systems. It enables motorist to receive information about traffic congestion, estimated travel-times, and road or lane closures caused by accidents, road works, inclement weather, disasters, etc. This paper reports on research into a structure for providing information in addition to the FM multiplex broadcasting currently provided by the VICS Center. The objective is to use this information platform to provide information more widely, including areas where emergency information carried over FM radio waves cannot be received during disasters. Through such research, the VICS Center aims to give society public infrastructure that will be useful during disasters in the future.]]></description>
      <pubDate>Wed, 24 Sep 2014 16:49:36 GMT</pubDate>
      <guid>https://trid.trb.org/View/1322106</guid>
    </item>
    <item>
      <title>Study on the Effect of Information Provision of VICS on Elderly Drivers' Behavior - Analyzing the Effect of Information Content on Driving Assistance and Disaster Event by Using Driving Simulator</title>
      <link>https://trid.trb.org/View/1320858</link>
      <description><![CDATA[This study describes the effect of the information contents of driving assistance and disaster event based on Vehicle Information and Communication System (VICS) on elderly drivers’ behavior. In the experiments, several prototypes of information contents were designed for two VICS services: one was the information service on prevention to misrecognize traffic signals at intersection, the other was the information service on probable area in which drivers encounter disaster event such as torrential rain or water-covered road. Driving simulator was used to examine elderly drivers’ behavior and psychological aspect under the prototypes of the VICS services based on various parameters of information content. The drivers’ behavior and the effect of the VICS service were evaluated in terms of driving performance, visual behavior, subjective reports, comparing elderly drivers with non-elderly drivers. The results show that particular VICS services do not always guide preparatory driver’s action to approach intersection and elevate sense of vigilance against the disaster event. The VICS services are expected to improve driver safety by designing the human machine interface (HMI) based on the results.]]></description>
      <pubDate>Wed, 27 Aug 2014 10:47:13 GMT</pubDate>
      <guid>https://trid.trb.org/View/1320858</guid>
    </item>
    <item>
      <title>Evaluation of Truck Ban Schemes Using Exact Optimization for Vehicle Routing Problem with Time Windows</title>
      <link>https://trid.trb.org/View/1242067</link>
      <description><![CDATA[This paper employs an exact solution approach for the Vehicle Routing and scheduling Problem with Time Windows (VRPTW) based on the column generation scheme developed earlier by the authors, and presents evaluation of truck ban schemes from the environmental improvement aspect on a realistic logistics instance based on the Vehicle Information and Communication System (VICS) data, an intelligent transportation system (ITS) application in Japan. Success or otherwise, of truck ban scheme depends on the degree of optimization in the pre truck ban situation. Therefore two scenarios have been assumed; one where the freight carrier does not have perfect information about the travel time on road network links but they use sophisticated optimization methods (such as exact method) and the second scenario assumes a higher degree of optimization in pre-truck ban situation where the freight carrier has perfect information about the travel time and it uses exact optimization methods. It was found that uniform truck bans on low travel speed streets improves the situation in first scenario but have little effect in the second one. A sequential truck ban policy was also evaluated in scenario 2. A series of exact optimization and truck bans result in a solution, in which no congested link exists with severe NOx level, thereby, solving the local pollution problem but the overall NOx level is increased.]]></description>
      <pubDate>Fri, 22 Mar 2013 14:54:20 GMT</pubDate>
      <guid>https://trid.trb.org/View/1242067</guid>
    </item>
    <item>
      <title>Estimating the Coverage Areas of VICS-FM Multiplex Broadcasts</title>
      <link>https://trid.trb.org/View/1136387</link>
      <description><![CDATA[The Vehicle Information and Communication System (VICS) Centre relies on beacons and FM multiplex broadcasts to provide various kinds of traffic information to vehicles in Japan equipped with car-navigation systems. It enables motorists to receive information about traffic congestion, estimated travel-times, and road or lane closures caused by accidents, road works, inclement weather, disasters, etc. This paper discusses the computer-generated simulations that were devised for estimating the coverage areas of the VICS service provided via FM multiplex broadcasts. It is a method that enables the authors to grasp the extent to which vehicles on a particular road can reliably pick up the signals. The simulations can also be applied to digital broadcasts, and the authors therefore believe that this method could be widely used to determine the coverage area of various broadcast channels in the future.]]></description>
      <pubDate>Mon, 23 Apr 2012 10:52:43 GMT</pubDate>
      <guid>https://trid.trb.org/View/1136387</guid>
    </item>
    <item>
      <title>Development of Multi Frequency Antenna with a Single Feeding Point In-vehicle Use</title>
      <link>https://trid.trb.org/View/1136106</link>
      <description><![CDATA[Radio frequency (RF) communication systems of automobiles have become diversified as the Intelligent Transportation Systems (ITS) devices such as GPS, VICS and ETC get popular in the market and are expected to have future expansion. The development of a multi frequency antenna with single feeding point is of most interest to reducing the number of antennas and cables of those systems. One of the developed antennas covers three frequency bands: 700MHz, 5.8GHz and 2.4GHz for Vehicle-Infrastructure Cooperative Systems (VICS) that support safe driving. This paper discusses the 5.8GHz-band performance in-vehicle use, following the discussion of 700MHz-band performance in the 16th ITS World Congress.]]></description>
      <pubDate>Mon, 23 Apr 2012 10:52:43 GMT</pubDate>
      <guid>https://trid.trb.org/View/1136106</guid>
    </item>
    <item>
      <title>Evaluating the Benefits of Reduced Fuel Consumption by Diffusion of 3-Media VICS Receivers on Board Commercial Vehicles</title>
      <link>https://trid.trb.org/View/1132808</link>
      <description><![CDATA[The VICS car navigation system with the 3-media receiver on-board has been assisting the driver in avoiding traffic congestion, and preliminary estimates have shown that fuel consumption has been reduced. Henceforth, the 3M receiver is anticipated to contribute positively to the environment through its introduction, particularly in vehicles for business use. In 2009, the VICS Center installed the 3-media receiver in 890 VICS car navigation systems that were equipped in vehicles used by a telecommunications company, and conducted joint tests for evaluating the benefits of reduced fuel consumption from the running data and fuel data, which were monitored. This report focuses on a comparative evaluation of fuel consumption before and after installation of the 3-media receiver on-board and the benefits of reduced fuel consumption.]]></description>
      <pubDate>Wed, 29 Feb 2012 07:21:37 GMT</pubDate>
      <guid>https://trid.trb.org/View/1132808</guid>
    </item>
    <item>
      <title>Speed Enhancement of Decision Tree Congestion Forecast</title>
      <link>https://trid.trb.org/View/911917</link>
      <description><![CDATA[This paper proposes a method that speeds up the decision tree congestion forecast technique. First, two conventional congestion forecast methods using Vehicle Information and Communication System (VICS) traffic information are described. The continuation method uses the current traffic condition to predict the future traffic condition. The statistics method uses past traffic data to predict the future traffic condition. The authors show that the decision tree prediction method has better forecast accuracy than the two conventional methods, and its accuracy doesn't depend on the time at the forecast destination. Finally, a method to speed up the congestion forecast process is proposed; it uses decision tree branch cutting with jam pattern simplification.]]></description>
      <pubDate>Fri, 19 Feb 2010 10:58:03 GMT</pubDate>
      <guid>https://trid.trb.org/View/911917</guid>
    </item>
    <item>
      <title>Travel Time Estimation Based on Congestion Degree</title>
      <link>https://trid.trb.org/View/911913</link>
      <description><![CDATA[The authors of this paper are developing a travel time estimation method that eliminates one of the weaknesses of Vehicle Information and Communication System (VICS). VICS provides congestion data for many, but certainly not all, individual roads. This paper proposes to use the congestion data to estimate the travel time of the roads not covered by VICS. The paper applies regression analysis to the congestion data and the travel time to determine a conversion equation. Next, various road attributes are subjected to qualification theory to optimize the parameters of the conversion equation. Finally, for roads whose travel times are not output by VICS, the proposed method applies the conversion equation with appropriate parameters. Authors conduct an experiment that confirms the method’s accuracy for intercity expressways.]]></description>
      <pubDate>Fri, 19 Feb 2010 10:57:58 GMT</pubDate>
      <guid>https://trid.trb.org/View/911913</guid>
    </item>
    <item>
      <title>Survey Research on The Social and Economic Benefit by VICS Information Provision</title>
      <link>https://trid.trb.org/View/906349</link>
      <description><![CDATA[This research was undertaken to estimate the social and economic impact of the Vehicle Information and Communication System (VICS) service as a social infrastructure. By utilizing a dynamic road traffic simulator, and based on the evaluation of three representative regions, it reproduced actual traffic flow, considering diverse route selection according to purpose of trip. Time loss reduction effectiveness, CO2 emission reduction effect and the fuel consumption reduction were calculated. The results have revealed that the spread of VICS-on board units effectively benefits society and improves the environment by ending traffic congestion.]]></description>
      <pubDate>Tue, 22 Dec 2009 09:00:50 GMT</pubDate>
      <guid>https://trid.trb.org/View/906349</guid>
    </item>
    <item>
      <title>NINE YEARS FROM YOKOHAMA</title>
      <link>https://trid.trb.org/View/754561</link>
      <description><![CDATA[This article presents an overview of key advances in Intelligent Transportation Systems in Japan since 1995. Focus is on in-vehicle navigation systems, the Vehicle Information and Communications System (VICS) initiative, and the implementation of the nationwide interoperable automated toll collection program. The majority of vehicle models currently being sold in Japan include navigation systems. These systems, first introduced in 1987, have evolved as a result of improved developments in position measurement technology, digital mapping, destination setting functions, the addition and expansion of communication functions, and reductions in cost. The VICS program, which was introduced in 1996, delivers updated traffic information to drivers through radio beacons, infrared beacons, and FM multiplex broadcasting from local stations. Automated toll collection was only started in Japan in 2001 but by the end of 2003, it was in operation at all toll facilities in the country. The key feature of the Japanese system is its Interoperability, with one piece of on- board equipment being used on all toll roads, despite the fact that different organizations manage the toll roads in the country. The article also discusses the growing presence of probe vehicle data collection technology in Japan.]]></description>
      <pubDate>Fri, 01 Apr 2005 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/754561</guid>
    </item>
    <item>
      <title>CURRENT CONDITION OF VICS AND FUTURE OBJECTIVES</title>
      <link>https://trid.trb.org/View/704419</link>
      <description><![CDATA[Road traffic in Japan induces traffic congestion, an increase of accidents and environmental problems due to noise and exhaust gas, while playing an important role as the foundation of the society that supports the livelihood of the nation and economic activities. VICS is a system that was developed in order to solve such road traffic problems by providing accurate information. The VICS Center was established in July 1995 to support safety and the smooth flow of traffic by efficient operation of social capital. Five years have passed since the distribution of VICS information was started for metropolitan areas including Tokyo Metropolitan, Tomei and Meishin Expressways in April 1996. This paper describes the "current condition of VICS" and "future objectives of VICS" in response to the diversification and advancement of user requirements and changes in the social environment.]]></description>
      <pubDate>Tue, 13 Jul 2004 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/704419</guid>
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