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.1995.518861
Y. Chou
This paper presents the design and applications of a decision support system developed for bus routing, route sequence mapping and passenger geocoding. The system, built on a geographic information system (GIS), is suitable for municipal transit planning and school bussing. The system consists of six operational modules: (1) the single routing module allows the user to select either street segments or bus stops from a street map to generate optimal routes; (2) the walking-distance maintenance module identifies street segments that are within a user-specified distance from a school; (3) the bus-stop optimization module identifies the optimal sites for locating bus stops based on travel demand; (4) the passenger plotting module reads a file of passenger information, geocodes their addresses, and then plots their locations on the street map; (5) the multiple routing module delineates multiple routes based on information of passengers, bus stop locations, and the bus fleet; and (6) the complex routing module generates multiple routes with multiple destinations for passengers that require special equipment. Additional modules can be programmed using the macro-language programming tool to serve user-specific purposes.
{"title":"Automatic bus routing and passenger geocoding with a geographic information system","authors":"Y. Chou","doi":"10.1109/VNIS.1995.518861","DOIUrl":"https://doi.org/10.1109/VNIS.1995.518861","url":null,"abstract":"This paper presents the design and applications of a decision support system developed for bus routing, route sequence mapping and passenger geocoding. The system, built on a geographic information system (GIS), is suitable for municipal transit planning and school bussing. The system consists of six operational modules: (1) the single routing module allows the user to select either street segments or bus stops from a street map to generate optimal routes; (2) the walking-distance maintenance module identifies street segments that are within a user-specified distance from a school; (3) the bus-stop optimization module identifies the optimal sites for locating bus stops based on travel demand; (4) the passenger plotting module reads a file of passenger information, geocodes their addresses, and then plots their locations on the street map; (5) the multiple routing module delineates multiple routes based on information of passengers, bus stop locations, and the bus fleet; and (6) the complex routing module generates multiple routes with multiple destinations for passengers that require special equipment. Additional modules can be programmed using the macro-language programming tool to serve user-specific purposes.","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":"88 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":"130636846","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.1995.518811
G. Rouse, H. French, H. Sasaki, T. Kawai
In this paper, the authors present a magnetoresistive magnetometer concept as a vehicle detector. A magnetoresistive three-axis magnetometer was designed, fabricated, characterized, and tested with the purpose of detecting vehicles on highways. Testing included making measurements at in-use roadway test sites. Magnetic 'signatures' of vehicles were collected and post-test data analyzed by applying a detection algorithm. Detection accuracy was greater than 90% for all types of vehicles passing over the detectors.
{"title":"A solid-state vehicle detector for roadway applications","authors":"G. Rouse, H. French, H. Sasaki, T. Kawai","doi":"10.1109/VNIS.1995.518811","DOIUrl":"https://doi.org/10.1109/VNIS.1995.518811","url":null,"abstract":"In this paper, the authors present a magnetoresistive magnetometer concept as a vehicle detector. A magnetoresistive three-axis magnetometer was designed, fabricated, characterized, and tested with the purpose of detecting vehicles on highways. Testing included making measurements at in-use roadway test sites. Magnetic 'signatures' of vehicles were collected and post-test data analyzed by applying a detection algorithm. Detection accuracy was greater than 90% for all types of vehicles passing over the detectors.","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":"55 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":"126673371","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.1995.518825
S. C. Kantowitz, B. Kantowitz, R. Hanowski
An important goal of in-vehicle advanced traveller information systems (ATIS) is to allow travellers to drive safely and efficiently by supplying real-time route guidance and traffic advisory information. Since the impact of in-vehicle ATIS on driver behavior is not yet fully understood, human factors research is required to fill this gap. While on-the-road field studies are important, simulators can also be used quite effectively to investigate the complex set of parameters that modulate driver choice and behavior. The Battelle Route Guidance Simulator is a low-cost tool that has been used successfully to study driver response to advanced vehicle navigation systems.
{"title":"The Battelle Route Guidance Simulator: a low-cost tool for studying driver response to advanced navigation systems","authors":"S. C. Kantowitz, B. Kantowitz, R. Hanowski","doi":"10.1109/VNIS.1995.518825","DOIUrl":"https://doi.org/10.1109/VNIS.1995.518825","url":null,"abstract":"An important goal of in-vehicle advanced traveller information systems (ATIS) is to allow travellers to drive safely and efficiently by supplying real-time route guidance and traffic advisory information. Since the impact of in-vehicle ATIS on driver behavior is not yet fully understood, human factors research is required to fill this gap. While on-the-road field studies are important, simulators can also be used quite effectively to investigate the complex set of parameters that modulate driver choice and behavior. The Battelle Route Guidance Simulator is a low-cost tool that has been used successfully to study driver response to advanced vehicle navigation systems.","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":"15 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":"125293518","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.1995.518882
H. Sodiekat
The paper gives an overview of the field trials and deployments and also explains the pro's and con's of infrared (IR) beacon communication for road traffic management. During the early eighties, first concepts for dynamic route guidance systems appeared in Europe, the US and Japan. In Europe, after successful performance of the LISB field trial in Berlin, EURO-SCOUT-using IR beacon communication-was developed. In Japan, field trials with microwave (MW) beacons (in RACS) as well as RF communication (in AMTICS) were carried out and recently, the Japanese National Police Agency (NPA) has opted for short-range communication using IR beacons. NPA sponsors today a large scale field trial with 3000 IR beacon heads and 500 participating vehicles. In Germany, the newly founded private company for route guidance and driver information services COPILOT has already deployed IR beacons in Stuttgart and Berlin. Operational field tests with IR beacons are also being performed in the US. Furthermore, in the German electronic toll collection field trial, qualified technologies compete in a multi-lane, free-flow, and high speed environment. Siemens participates with its ChipTicket System relying on IR communication between roadside and vehicles.
{"title":"Infrared communication for dynamic route guidance and driver information services","authors":"H. Sodiekat","doi":"10.1109/VNIS.1995.518882","DOIUrl":"https://doi.org/10.1109/VNIS.1995.518882","url":null,"abstract":"The paper gives an overview of the field trials and deployments and also explains the pro's and con's of infrared (IR) beacon communication for road traffic management. During the early eighties, first concepts for dynamic route guidance systems appeared in Europe, the US and Japan. In Europe, after successful performance of the LISB field trial in Berlin, EURO-SCOUT-using IR beacon communication-was developed. In Japan, field trials with microwave (MW) beacons (in RACS) as well as RF communication (in AMTICS) were carried out and recently, the Japanese National Police Agency (NPA) has opted for short-range communication using IR beacons. NPA sponsors today a large scale field trial with 3000 IR beacon heads and 500 participating vehicles. In Germany, the newly founded private company for route guidance and driver information services COPILOT has already deployed IR beacons in Stuttgart and Berlin. Operational field tests with IR beacons are also being performed in the US. Furthermore, in the German electronic toll collection field trial, qualified technologies compete in a multi-lane, free-flow, and high speed environment. Siemens participates with its ChipTicket System relying on IR communication between roadside and vehicles.","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":"153 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":"114433204","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.1995.518821
G. Pang, K. Takahashi, T. Yokota, H. Takenaga
The objective of this work is to model driver behaviour in the area of route selection. The research focuses on an optimum route search function in a typical in-car navigation system or dynamic route guidance system. In this work, the authors emphasize the need to orientate the route selection method on the driver's preference. Each route candidate has a set of attributes. A fuzzy-neural approach is used to represent the correlation of the attributes with the driver's route selection. A recommendation or route ranking can be provided to the driver. Based on a training of the fuzzy-neural net on the driver's choice, the route selection function can be made adaptive to the decision-making of the driver.
{"title":"Adaptive route selection for dynamic route guidance system based on fuzzy-neural approaches","authors":"G. Pang, K. Takahashi, T. Yokota, H. Takenaga","doi":"10.1109/VNIS.1995.518821","DOIUrl":"https://doi.org/10.1109/VNIS.1995.518821","url":null,"abstract":"The objective of this work is to model driver behaviour in the area of route selection. The research focuses on an optimum route search function in a typical in-car navigation system or dynamic route guidance system. In this work, the authors emphasize the need to orientate the route selection method on the driver's preference. Each route candidate has a set of attributes. A fuzzy-neural approach is used to represent the correlation of the attributes with the driver's route selection. A recommendation or route ranking can be provided to the driver. Based on a training of the fuzzy-neural net on the driver's choice, the route selection function can be made adaptive to the decision-making of the driver.","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":"19 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":"114784054","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.1995.518853
M. Kojima, H. Kawashima, T. Sugiura, A. Ohme
Heavy congestion sometimes occurs in the "weaving section" of the highway road network and this phenomenon is noted from the point of view of the solution of traffic congestion. In this paper, the authors analyze the behavior of each vehicle in the weaving section by using a microscopic computer simulation model. The highway interchange used in the model is a weaving section in which two roads cross in an "X" manner and a number of vehicles traverse the interchange by changing lane. The model is described by three basic equations and these equations consist of simple forward movement, following movement and the stopping movement. In this study, the authors mainly analyze where behaviors of changing lane and braking occur in this weaving section, these analyses making it possible to investigate the smoothness of traffic flow.
{"title":"The analysis of vehicle behavior in the weaving section on the highway using a micro-simulator","authors":"M. Kojima, H. Kawashima, T. Sugiura, A. Ohme","doi":"10.1109/VNIS.1995.518853","DOIUrl":"https://doi.org/10.1109/VNIS.1995.518853","url":null,"abstract":"Heavy congestion sometimes occurs in the \"weaving section\" of the highway road network and this phenomenon is noted from the point of view of the solution of traffic congestion. In this paper, the authors analyze the behavior of each vehicle in the weaving section by using a microscopic computer simulation model. The highway interchange used in the model is a weaving section in which two roads cross in an \"X\" manner and a number of vehicles traverse the interchange by changing lane. The model is described by three basic equations and these equations consist of simple forward movement, following movement and the stopping movement. In this study, the authors mainly analyze where behaviors of changing lane and braking occur in this weaving section, these analyses making it possible to investigate the smoothness of traffic flow.","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":"24 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":"124000013","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.1995.518822
T. Reed
This paper reports a conjoint analysis study that tested the hypothesis that the burden of waiting for transit will decrease as traveler certainty with respect to wait duration increases, i.e., with provision of real-time transit schedule information. Conjoint analysis has been used extensively as a means to evaluate individual preference or utility. The target audience for the conjoint study, which was carried out through the US mail in the Spring of 1994, consisted of 1000 randomly sampled employees on the University of Michigan Medical Campus. The conjoint data and the model developed through the study show that real-time transit schedule information is of potentially significant value to transit customers in that the burden of a given wait decreases as the degree of certainty about the duration of the wait increases. This result should further motivate transit system designers to redouble efforts to provide real-time transit schedule information. This is especially true since such information could also reduce the duration of the wait. Moreover, the conjoint model developed acts as an inferential tool for further investigating the relationship between information, reliability, and travel time and should be of significant value in transit system design.
{"title":"Reduction in the burden of waiting for public transit due to real-time schedule information: a conjoint analysis study","authors":"T. Reed","doi":"10.1109/VNIS.1995.518822","DOIUrl":"https://doi.org/10.1109/VNIS.1995.518822","url":null,"abstract":"This paper reports a conjoint analysis study that tested the hypothesis that the burden of waiting for transit will decrease as traveler certainty with respect to wait duration increases, i.e., with provision of real-time transit schedule information. Conjoint analysis has been used extensively as a means to evaluate individual preference or utility. The target audience for the conjoint study, which was carried out through the US mail in the Spring of 1994, consisted of 1000 randomly sampled employees on the University of Michigan Medical Campus. The conjoint data and the model developed through the study show that real-time transit schedule information is of potentially significant value to transit customers in that the burden of a given wait decreases as the degree of certainty about the duration of the wait increases. This result should further motivate transit system designers to redouble efforts to provide real-time transit schedule information. This is especially true since such information could also reduce the duration of the wait. Moreover, the conjoint model developed acts as an inferential tool for further investigating the relationship between information, reliability, and travel time and should be of significant value in transit system design.","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":"20 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":"124960242","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.1995.518847
B. Hellinga, M. Baker, M. Carter, M. Van Aerde
Legislation, which links federal funding with the successful demonstration that emission standards will be met, has caused traffic engineers to become increasingly concerned with the monitoring, control and mitigation of air-borne pollutants produced by automobiles. In order to reduce the level of these emissions many traffic engineers are considering the application of a variety of ATIS/ATMS (advanced traveler information systems/advanced traffic management systems) strategies. Traffic engineers have also begun to search for appropriate methods for estimating changes in the generation and dispersion of pollutants as a result of different ATIS/ATMS strategies. The standard approach, to modelling emission dispersion, relies on the use of air quality standard (AQS) models. However, these models generally require as input a spatially correlated time series of the magnitude of the pollutant input sources. An accurate estimate of this input data stream, or of changes to this input stream due to the deployment of ATIS/ATMS, has been to date difficult to obtain. This paper describes the development and sample application of an extension to a standard traffic network modelling approach, that can be used to develop either the point, line or area source emissions that are required as inputs to AQS models. The application of this modelling approach is illustrated for a network representing Orlando, Florida to demonstrate its functional capabilities and its applicability to realistic sized urban centres.
{"title":"Linking ATIS/ATMS and environmental plume dispersion models","authors":"B. Hellinga, M. Baker, M. Carter, M. Van Aerde","doi":"10.1109/VNIS.1995.518847","DOIUrl":"https://doi.org/10.1109/VNIS.1995.518847","url":null,"abstract":"Legislation, which links federal funding with the successful demonstration that emission standards will be met, has caused traffic engineers to become increasingly concerned with the monitoring, control and mitigation of air-borne pollutants produced by automobiles. In order to reduce the level of these emissions many traffic engineers are considering the application of a variety of ATIS/ATMS (advanced traveler information systems/advanced traffic management systems) strategies. Traffic engineers have also begun to search for appropriate methods for estimating changes in the generation and dispersion of pollutants as a result of different ATIS/ATMS strategies. The standard approach, to modelling emission dispersion, relies on the use of air quality standard (AQS) models. However, these models generally require as input a spatially correlated time series of the magnitude of the pollutant input sources. An accurate estimate of this input data stream, or of changes to this input stream due to the deployment of ATIS/ATMS, has been to date difficult to obtain. This paper describes the development and sample application of an extension to a standard traffic network modelling approach, that can be used to develop either the point, line or area source emissions that are required as inputs to AQS models. The application of this modelling approach is illustrated for a network representing Orlando, Florida to demonstrate its functional capabilities and its applicability to realistic sized urban centres.","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":"36 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":"128980412","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.1995.518839
L. Fu, L. Rilett
For most in-vehicle route guidance systems (RGS) currently under development, the optimal route between an origin and destination is defined as the one with the minimum expected travel time. This optimal route is calculated by applying standard shortest path algorithms to the network where the link travel times are modeled as deterministic rather than as stochastic. The drawback to this method is that while it is computationally tractable, it may, in fact, generate a sub-optimal solution. Conversely, when the stochastic nature of link travel times are explicitly modeled, an optimal algorithm can become computationally inefficient for use within an actual application. The objective of this paper is to develop a new shortest path algorithm which takes into account the stochastic nature of link travel times without significantly increasing the overall computation time. The dynamic and stochastic shortest path problem (DSSPP) is first defined and the properties associated with this problem are discussed. A heuristic algorithm based on the k-shortest path algorithm is subsequently proposed. The trade-off between solution quality and computational efficiency of the proposed algorithm will be demonstrated on a network from Edmonton, Alberta, Canada.
{"title":"Estimation of expected minimum paths in dynamic and stochastic traffic networks","authors":"L. Fu, L. Rilett","doi":"10.1109/VNIS.1995.518839","DOIUrl":"https://doi.org/10.1109/VNIS.1995.518839","url":null,"abstract":"For most in-vehicle route guidance systems (RGS) currently under development, the optimal route between an origin and destination is defined as the one with the minimum expected travel time. This optimal route is calculated by applying standard shortest path algorithms to the network where the link travel times are modeled as deterministic rather than as stochastic. The drawback to this method is that while it is computationally tractable, it may, in fact, generate a sub-optimal solution. Conversely, when the stochastic nature of link travel times are explicitly modeled, an optimal algorithm can become computationally inefficient for use within an actual application. The objective of this paper is to develop a new shortest path algorithm which takes into account the stochastic nature of link travel times without significantly increasing the overall computation time. The dynamic and stochastic shortest path problem (DSSPP) is first defined and the properties associated with this problem are discussed. A heuristic algorithm based on the k-shortest path algorithm is subsequently proposed. The trade-off between solution quality and computational efficiency of the proposed algorithm will be demonstrated on a network from Edmonton, Alberta, Canada.","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":"22 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":"127722357","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.1995.518842
Y. Kaneko, I. Ohe, H. Kawashima, T. Hirano
The function of an expressway is very important in modern cities, but the increase of traffic demand has created the recurrent traffic jam. The traffic jam is one of the main social problems. As a consequence, drivers desire the provision of accurate information about congestion. This paper proposes a new definition of the degree of congestion based on the analysis of traffic flow. In the present surveillance of congestion, the judgement is composed of two stage procedures. The first procedure is the judgement of congestion at each section, about 1 km. The second procedure is to combine the judgements of sections to the total judgement of a link which is about 5-10 km. The results of the first procedure fluctuate from section to section and therefore the overall degree of congestion of a link which is commonly used in traffic surveillance becomes unstable. This is due to the fact that the judgement of the first procedure is based on only the velocity measured by vehicle detectors. The general theory of traffic flow tells that the traffic condition can't be accurately judged by velocity. To solve this problem, volume, velocity and occupancy are handled at the same time in analyzing the traffic flow.
{"title":"The judgement of the traffic condition by using the cluster analysis","authors":"Y. Kaneko, I. Ohe, H. Kawashima, T. Hirano","doi":"10.1109/VNIS.1995.518842","DOIUrl":"https://doi.org/10.1109/VNIS.1995.518842","url":null,"abstract":"The function of an expressway is very important in modern cities, but the increase of traffic demand has created the recurrent traffic jam. The traffic jam is one of the main social problems. As a consequence, drivers desire the provision of accurate information about congestion. This paper proposes a new definition of the degree of congestion based on the analysis of traffic flow. In the present surveillance of congestion, the judgement is composed of two stage procedures. The first procedure is the judgement of congestion at each section, about 1 km. The second procedure is to combine the judgements of sections to the total judgement of a link which is about 5-10 km. The results of the first procedure fluctuate from section to section and therefore the overall degree of congestion of a link which is commonly used in traffic surveillance becomes unstable. This is due to the fact that the judgement of the first procedure is based on only the velocity measured by vehicle detectors. The general theory of traffic flow tells that the traffic condition can't be accurately judged by velocity. To solve this problem, volume, velocity and occupancy are handled at the same time in analyzing the traffic flow.","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":"33 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":"126120850","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
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