Pacific Rim TransTech Conference. 1995 Vehicle Navigation and Information Systems Conference Proceedings. 6th International VNIS. A Ride into the Future最新文献
Pub Date : 1995-07-30DOI: 10.1109/VNIS.1995.518810
D. J. Holdener, Shawn Turner
Probe vehicle travel time data is an important source of real-time travel information for a variety of intelligent transportation system applications. This paper investigates the required minimum number of probe vehicles that are necessary to report real-time travel speeds and times for a desired statistical accuracy. Empirical travel time data from the Houston traffic monitoring system were analyzed to calculate travel time variation and the corresponding minimum required probe vehicle sample sizes. A regression equation was developed to estimate travel time variation, which can then be used to calculate sample sizes. It was concluded that the current number of probe vehicles in Houston provide reliable peak period travel speed information (i.e., 95% confidence that displayed real-time speeds are /spl plusmn/10%).
{"title":"Probe vehicle sample sizes for real-time information: the Houston experience","authors":"D. J. Holdener, Shawn Turner","doi":"10.1109/VNIS.1995.518810","DOIUrl":"https://doi.org/10.1109/VNIS.1995.518810","url":null,"abstract":"Probe vehicle travel time data is an important source of real-time travel information for a variety of intelligent transportation system applications. This paper investigates the required minimum number of probe vehicles that are necessary to report real-time travel speeds and times for a desired statistical accuracy. Empirical travel time data from the Houston traffic monitoring system were analyzed to calculate travel time variation and the corresponding minimum required probe vehicle sample sizes. A regression equation was developed to estimate travel time variation, which can then be used to calculate sample sizes. It was concluded that the current number of probe vehicles in Houston provide reliable peak period travel speed information (i.e., 95% confidence that displayed real-time speeds are /spl plusmn/10%).","PeriodicalId":337008,"journal":{"name":"Pacific Rim TransTech Conference. 1995 Vehicle Navigation and Information Systems Conference Proceedings. 6th International VNIS. A Ride into the Future","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117353887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-07-30DOI: 10.1109/VNIS.1995.518888
Han Reijmers, M. Ozguzel, R. Prasad
This paper presents mathematical models to approximate the spacing between the vehicles in a lane on a motorway and the distance between a fixed base station and the nearest vehicle when a data packet is transmitted. These models are optimized for different measured traffic conditions. The results are used to calculate the success probability for a test packet in the presence of interference from the same lane. The desired signal is Rice distributed; the interfering signals are Rayleigh distributed. The average received power depends on the distance between the base station and the vehicles and the receiver uses the capture effect. The derived formulae can be used in further calculations of the data traffic in mobile radio local area networks.
{"title":"Performance analysis of a communication network for intelligent transport systems","authors":"Han Reijmers, M. Ozguzel, R. Prasad","doi":"10.1109/VNIS.1995.518888","DOIUrl":"https://doi.org/10.1109/VNIS.1995.518888","url":null,"abstract":"This paper presents mathematical models to approximate the spacing between the vehicles in a lane on a motorway and the distance between a fixed base station and the nearest vehicle when a data packet is transmitted. These models are optimized for different measured traffic conditions. The results are used to calculate the success probability for a test packet in the presence of interference from the same lane. The desired signal is Rice distributed; the interfering signals are Rayleigh distributed. The average received power depends on the distance between the base station and the vehicles and the receiver uses the capture effect. The derived formulae can be used in further calculations of the data traffic in mobile radio local area networks.","PeriodicalId":337008,"journal":{"name":"Pacific Rim TransTech Conference. 1995 Vehicle Navigation and Information Systems Conference Proceedings. 6th International VNIS. A Ride into the Future","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116447630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-07-30DOI: 10.1109/VNIS.1995.518820
H. Kurogo, K. Takada, H. Akiyama
A parking guidance and information system for the Shinjuku area of Tokyo is described as Japan's first parking guidance and information system (PGIS) to have a full-fledged guidance function. The concept of the Shinjuku area parking guidance and information system is outlined. The surveys conducted before and after the introduction of the Shinjuku area PGIS confirmed its effectiveness in: (1) improving the convenience of users; (2) reducing on-street parking; (3) enhancing the order of traffic in the Shinjuku area; (4) absorbing into off-street parking lots those cars parked on-street for a short time; and (5) equalizing the number of cars parked between available parking lots. The measures to be taken for further improving the Shinjuku area PGIS are presented at the end.
{"title":"Concept of a parking guidance system and its effects in the Shinjuku area-configuration, performance, and future improvement of system","authors":"H. Kurogo, K. Takada, H. Akiyama","doi":"10.1109/VNIS.1995.518820","DOIUrl":"https://doi.org/10.1109/VNIS.1995.518820","url":null,"abstract":"A parking guidance and information system for the Shinjuku area of Tokyo is described as Japan's first parking guidance and information system (PGIS) to have a full-fledged guidance function. The concept of the Shinjuku area parking guidance and information system is outlined. The surveys conducted before and after the introduction of the Shinjuku area PGIS confirmed its effectiveness in: (1) improving the convenience of users; (2) reducing on-street parking; (3) enhancing the order of traffic in the Shinjuku area; (4) absorbing into off-street parking lots those cars parked on-street for a short time; and (5) equalizing the number of cars parked between available parking lots. The measures to be taken for further improving the Shinjuku area PGIS are presented at the end.","PeriodicalId":337008,"journal":{"name":"Pacific Rim TransTech Conference. 1995 Vehicle Navigation and Information Systems Conference Proceedings. 6th International VNIS. A Ride into the Future","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128267861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-07-30DOI: 10.1109/VNIS.1995.518837
M. Cremer
A computational scheme is presented for dynamic route travel time prediction. The basis for this method is macroscopic simulation which yields the time-dependent speed profile along all routes of a given network. Then the concept of virtual vehicles is introduced which moves test vehicles from relevant origins to selected destinations according to the respective mean speed values. Two application examples underline the efficiency of the concept: multimodel driver information in an urban corridor; and user optimal rerouting on an interurban freeway network.
{"title":"On the calculation of individual travel times by macroscopic models","authors":"M. Cremer","doi":"10.1109/VNIS.1995.518837","DOIUrl":"https://doi.org/10.1109/VNIS.1995.518837","url":null,"abstract":"A computational scheme is presented for dynamic route travel time prediction. The basis for this method is macroscopic simulation which yields the time-dependent speed profile along all routes of a given network. Then the concept of virtual vehicles is introduced which moves test vehicles from relevant origins to selected destinations according to the respective mean speed values. Two application examples underline the efficiency of the concept: multimodel driver information in an urban corridor; and user optimal rerouting on an interurban freeway network.","PeriodicalId":337008,"journal":{"name":"Pacific Rim TransTech Conference. 1995 Vehicle Navigation and Information Systems Conference Proceedings. 6th International VNIS. A Ride into the Future","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129460832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-07-30DOI: 10.1109/VNIS.1995.518883
A. Santiago, A. Kanaan, C. Franklin
The Federal Highway Administration (FHWA) is developing the Traffic Management Laboratory (TML) as an environment in which traffic researchers and engineers can perform advanced research in advanced traffic management systems, from concept analyses to practical real-time control of traffic networks. The TML testbed enables the FHWA to evaluate new products, simulate monitoring and control of traffic networks using intelligent transportation systems (ITS) applications, and introduce traffic professionals to the emerging ITS technologies. The development of the Traffic Management Laboratory testbed has broken new ground in the area of systems design for distributed real-time simulation. By following an object-oriented approach and using the ObjecTime CASE tool, traffic engineers now have direct, automated traceability between the system design and the system implementation.
{"title":"The Traffic Management Laboratory: system design","authors":"A. Santiago, A. Kanaan, C. Franklin","doi":"10.1109/VNIS.1995.518883","DOIUrl":"https://doi.org/10.1109/VNIS.1995.518883","url":null,"abstract":"The Federal Highway Administration (FHWA) is developing the Traffic Management Laboratory (TML) as an environment in which traffic researchers and engineers can perform advanced research in advanced traffic management systems, from concept analyses to practical real-time control of traffic networks. The TML testbed enables the FHWA to evaluate new products, simulate monitoring and control of traffic networks using intelligent transportation systems (ITS) applications, and introduce traffic professionals to the emerging ITS technologies. The development of the Traffic Management Laboratory testbed has broken new ground in the area of systems design for distributed real-time simulation. By following an object-oriented approach and using the ObjecTime CASE tool, traffic engineers now have direct, automated traceability between the system design and the system implementation.","PeriodicalId":337008,"journal":{"name":"Pacific Rim TransTech Conference. 1995 Vehicle Navigation and Information Systems Conference Proceedings. 6th International VNIS. A Ride into the Future","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121912487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-07-30DOI: 10.1109/VNIS.1995.518814
H. Hsieh, K. Ting, Ruey-Min Wang
At an oversaturated intersection, most of the traffic image systems become less effective due to the combinations of driver behavior chaos and curved-shape lane geometric design. The authors describe a unique line and curve detector image process system which specifically fits in nonregular geometric layout and traffic characteristics data collections, e.g. turn ratio, queue length, volume, etc. The benefit of this image processing system is not limited to data collection, but generally can apply to intersection incident detection, signal control strategy planning and driving behavior analysis.
{"title":"An image processing system for signalized intersections","authors":"H. Hsieh, K. Ting, Ruey-Min Wang","doi":"10.1109/VNIS.1995.518814","DOIUrl":"https://doi.org/10.1109/VNIS.1995.518814","url":null,"abstract":"At an oversaturated intersection, most of the traffic image systems become less effective due to the combinations of driver behavior chaos and curved-shape lane geometric design. The authors describe a unique line and curve detector image process system which specifically fits in nonregular geometric layout and traffic characteristics data collections, e.g. turn ratio, queue length, volume, etc. The benefit of this image processing system is not limited to data collection, but generally can apply to intersection incident detection, signal control strategy planning and driving behavior analysis.","PeriodicalId":337008,"journal":{"name":"Pacific Rim TransTech Conference. 1995 Vehicle Navigation and Information Systems Conference Proceedings. 6th International VNIS. A Ride into the Future","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132876994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-07-30DOI: 10.1109/VNIS.1995.518874
K. Vaughn, E. Bjorge, L. Senn
The paper describes how the Washington State Department of Transportation (WSDOT), Federal Highway Administration (FHWA), and Farradyne Systems, Inc. (FSI) are participating in an operational test of Travel Aid, to demonstrate the use of in-vehicle signing to improve safety in a rural environment. This project is currently under construction and is located along the Snoqualmie Pass, roughly 50 miles east of Seattle, Washington.
{"title":"Travel Aid: an in-vehicle signing operational test","authors":"K. Vaughn, E. Bjorge, L. Senn","doi":"10.1109/VNIS.1995.518874","DOIUrl":"https://doi.org/10.1109/VNIS.1995.518874","url":null,"abstract":"The paper describes how the Washington State Department of Transportation (WSDOT), Federal Highway Administration (FHWA), and Farradyne Systems, Inc. (FSI) are participating in an operational test of Travel Aid, to demonstrate the use of in-vehicle signing to improve safety in a rural environment. This project is currently under construction and is located along the Snoqualmie Pass, roughly 50 miles east of Seattle, Washington.","PeriodicalId":337008,"journal":{"name":"Pacific Rim TransTech Conference. 1995 Vehicle Navigation and Information Systems Conference Proceedings. 6th International VNIS. A Ride into the Future","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116376860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-07-30DOI: 10.1109/VNIS.1995.518817
K. Imazu, Y. Mita
This paper reports the results of the achievement of high accuracy of detection, a speed-measurement function, and a vehicle-classification function for small and large vehicles using optical vehicle detectors (IRVDs) installed on the roads whose traffic is to be controlled. The detector described in the present report has a communication function for in-vehicle units. This function is equivalent to that of the IRVDs currently being used. In this paper, the authors provide a simple introduction of its specifications. This report concentrates on the detection function, which is the most important feature of the equipment in question.
{"title":"Range-measurement-type optical vehicle detector","authors":"K. Imazu, Y. Mita","doi":"10.1109/VNIS.1995.518817","DOIUrl":"https://doi.org/10.1109/VNIS.1995.518817","url":null,"abstract":"This paper reports the results of the achievement of high accuracy of detection, a speed-measurement function, and a vehicle-classification function for small and large vehicles using optical vehicle detectors (IRVDs) installed on the roads whose traffic is to be controlled. The detector described in the present report has a communication function for in-vehicle units. This function is equivalent to that of the IRVDs currently being used. In this paper, the authors provide a simple introduction of its specifications. This report concentrates on the detection function, which is the most important feature of the equipment in question.","PeriodicalId":337008,"journal":{"name":"Pacific Rim TransTech Conference. 1995 Vehicle Navigation and Information Systems Conference Proceedings. 6th International VNIS. A Ride into the Future","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123565481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-07-30DOI: 10.1109/VNIS.1995.518849
V. Alexiadis, S.M. Pickrell
The purpose of this paper is to identify desirable improvements to specific components of travel demand models and to develop recommendations for specific model enhancements. These model enhancements can significantly improve travel demand model capabilities in assessing impacts resulting from the deployment of intelligent transportation systems (ITS) user services and high occupancy vehicle (HOV) lanes. One of the major concerns about travel demand models is the inability of model systems to assess large changes in transportation systems and operations being either under deployment or being contemplated for the near future including HOV lanes, ITS technologies, widespread road pricing, and fundamental changes in land use policy. Travel demand models, however, have only limited capability to accurately estimate changes in operational characteristics such as delay, speed, and queuing. Therefore, recommendations for model enhancements in this paper focus on refinements to the operational components of travel demand models including assignment and mode choice. This paper includes recommendations for model enhancements in the following areas: improved forecasting of speed, delay, and queuing; peak spreading; dynamic assignment; HOV demand modeling; HOV supply modeling; representation of traveler information, and enhanced sensitivity of emissions and fuel consumption estimation procedures.
{"title":"Enhancements to travel demand models for ITS and HOV impact assessment","authors":"V. Alexiadis, S.M. Pickrell","doi":"10.1109/VNIS.1995.518849","DOIUrl":"https://doi.org/10.1109/VNIS.1995.518849","url":null,"abstract":"The purpose of this paper is to identify desirable improvements to specific components of travel demand models and to develop recommendations for specific model enhancements. These model enhancements can significantly improve travel demand model capabilities in assessing impacts resulting from the deployment of intelligent transportation systems (ITS) user services and high occupancy vehicle (HOV) lanes. One of the major concerns about travel demand models is the inability of model systems to assess large changes in transportation systems and operations being either under deployment or being contemplated for the near future including HOV lanes, ITS technologies, widespread road pricing, and fundamental changes in land use policy. Travel demand models, however, have only limited capability to accurately estimate changes in operational characteristics such as delay, speed, and queuing. Therefore, recommendations for model enhancements in this paper focus on refinements to the operational components of travel demand models including assignment and mode choice. This paper includes recommendations for model enhancements in the following areas: improved forecasting of speed, delay, and queuing; peak spreading; dynamic assignment; HOV demand modeling; HOV supply modeling; representation of traveler information, and enhanced sensitivity of emissions and fuel consumption estimation procedures.","PeriodicalId":337008,"journal":{"name":"Pacific Rim TransTech Conference. 1995 Vehicle Navigation and Information Systems Conference Proceedings. 6th International VNIS. A Ride into the Future","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121792655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-07-30DOI: 10.1109/VNIS.1995.518862
C. Scott, C. Drane
For motor vehicles, the road network represents a source of position information. The roads restrict the domain of the motor vehicle and therefore it follows that any measurement not falling within this domain is clearly affected by measurement noise. The authors have previously developed an estimator for translating position measurements onto a road thereby removing a component of the measurement noise. This work is now extended to cover the translation of velocity measurements and the joint estimation of position and velocity. Further to this the problem of applying the estimator to a complete road network has been analyzed. A Kalman filter, referred to as the spatially reduced Kalman filter (SRKF), has been developed to utilise the reduced dimensionality of the translated data. For each possible trajectory through the road network, an SRKF is initialised and updated. Target-tracking techniques have been adapted to enable the best trajectory at any given time to be selected and poor trajectories to be deleted. The result is an estimation process that results in better accuracy and effective road identification.
{"title":"An optimal map-aided position estimator for tracking motor vehicles","authors":"C. Scott, C. Drane","doi":"10.1109/VNIS.1995.518862","DOIUrl":"https://doi.org/10.1109/VNIS.1995.518862","url":null,"abstract":"For motor vehicles, the road network represents a source of position information. The roads restrict the domain of the motor vehicle and therefore it follows that any measurement not falling within this domain is clearly affected by measurement noise. The authors have previously developed an estimator for translating position measurements onto a road thereby removing a component of the measurement noise. This work is now extended to cover the translation of velocity measurements and the joint estimation of position and velocity. Further to this the problem of applying the estimator to a complete road network has been analyzed. A Kalman filter, referred to as the spatially reduced Kalman filter (SRKF), has been developed to utilise the reduced dimensionality of the translated data. For each possible trajectory through the road network, an SRKF is initialised and updated. Target-tracking techniques have been adapted to enable the best trajectory at any given time to be selected and poor trajectories to be deleted. The result is an estimation process that results in better accuracy and effective road identification.","PeriodicalId":337008,"journal":{"name":"Pacific Rim TransTech Conference. 1995 Vehicle Navigation and Information Systems Conference Proceedings. 6th International VNIS. A Ride into the Future","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121753244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pacific Rim TransTech Conference. 1995 Vehicle Navigation and Information Systems Conference Proceedings. 6th International VNIS. A Ride into the Future
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：