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原文传递 ORION DATA DISTRIBUTION NODES : A COMPARISON STUDY FOR PROVIDING INTER-AGENCY COMMUNICATION OF NEAR REAL TIME TRANSPORTATION DATA.

题名：	ORION DATA DISTRIBUTION NODES : A COMPARISON STUDY FOR PROVIDING INTER-AGENCY COMMUNICATION OF NEAR REAL TIME TRANSPORTATION DATA.
作者：	Starr-Ray-A
关键词：	data-transmission-systems; databases-; information-systems; real-time-information
摘要：	The Orion project is a model deployment of ITS technologies in the Minneapolis/St. Paul metropolitan area as part of the Minnesota Guidestar program. Lockheed Martin Federal Systems was selected to be the project's system integrator, and the systems the project is developing are expected to be operational by December, 1998. The Orion project contains many individual initiatives in the areas of freeway management, arterial management, incident management, transit management, and traveler information. Data provided by these initiatives will be shared among PUB Published by: lic agencies and from the PUB Published by: lic agencies to private traveler information providers by means of a network of Data Distribution Nodes (DDNs). The project performed a comparison study to select an approach for implementing the DDNs and their associated regional map displays. A database centered approach was compared with a data communications centered approach as the means for sharing data. It was seen that good performance in the area of distributing data was more important than the ability to store data when the data is valuable only in near real time. Also, a GIS package approach, an intranet web server approach, a custom map application approach, and a video map distribution approach were compared as the means for providing a map display to the PUB Published by: lic agency system operators. There was seen to be a trade-off between responsiveness of the interface to the system operator and the level of system administration support required. The selected approach was communication centered rather than database centered, and will provide PUB Published by: lic agency system operators with a map display by the use of a mapping package located at each agency location.
总页数：	ITS America. Meeting (8th : 1998 : Detroit, Mich.). Transportation technology for tomorrow : conference proceedings. 1998. pp12
报告类型：	科技报告