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 Wysłany: Nie 7:49, 09 Sty 2011 Temat postu: moncler outlet GIS in the microscopic traffic simu |
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GIS in the microscopic traffic simulation application
Equipment. Under normal circumstances, and emergency traffic,[link widoczny dla zalogowanych], saturation, speed, flow reliability,[link widoczny dla zalogowanych], traffic density, service levels, delay ratio, queue length of the level of the operational status of such evaluation; on the operational status of key nodes, such as congestion ramp, weaving area, etc.; According to the simulation data, the use of expert system for traffic incident template library analysis and decision-making; and traffic environment in the simulation parameters and functions of the variable; traffic management system and road geometric design based on the evaluation analysis; analysis of road traffic security and for traffic engineering theory; on urban traffic pollution evaluation. 3.4G / S output module full use of GIS in the attribute database and the graphical representation of the advantages of combining functionality, will be the simulation data into the database, while taking advantage of GIS good graphics output, the results do various forms of performance . Playback speed, start and termination of dynamic simulation; display sections, ramp,[link widoczny dla zalogowanych], weaving the traffic operation and traffic assessment. 4 GIS-based traffic simulation model development because of traffic simulation model based on GIS theory and implementation of technology in the continuous development of the problems facing the expansion. Currently, the traffic simulation model based on GIS issues need to be resolved are: (1) Model Description: The intersection is also limited to a single operation,[link widoczny dla zalogowanych], do not reflect the upstream and downstream sections, and the dynamics of the entire road network; the operation of the model vehicle No description of non-motorized bicycles; not describe the behavior of pedestrians; very few models take into account the environmental impact of transport vehicles and evaluation; model of traffic environment and more confined to one aspect or several aspects related to traffic less the environment; considered only for the way public transport priority and no priority to priority to the description of the vehicle; (2) GIS spatial analysis and graphical visualization capabilities combined with the ITS needs: ITS historical data and real-time data in a large number of hidden undiscovered patterns and characteristics, such as traffic congestion law,[link widoczny dla zalogowanych], how to choose the best path of travel, but only these data are not easy to study and said, GIS has powerful spatial analysis functions and graphic visualization can from the pile of messy The data observed in the intrinsic link between the data and experience to pass by the inherent nature of graphics, if the combination of ITS GIS spatial data analysis and graphical visualization capabilities, ease of research and found that the internal laws of Transportation, GIS will be more the role of targeted; (3) temporal GIS-T research and development: temporal GIS-T on the one hand is due to urban roads and transport facilities of the change, the relevant data in the G / S-T in the refresh problem, on the one hand in the ITS data in real-time traffic flow, traffic monitoring data, GPS data to GIS-T combined with its data management issues; (4) Intelligent GIS query: query GIS-T network is multi-user, but Not everyone is fully aware of GIS query rules, the use of intelligent technology such as Agent technology, design of fuzzy object query GIS-T technology, the query interface and procedures to enable GIS-T as the query function as experts, so that the initial query using the query process user and not very familiar with the computer user can get information they want.
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