Navigation Requirements for Intelligent Transportation Systems (ITS)

Vijay M. Patel and William R. Cairns

Abstract:	The Presidential Decision Directive of March 1996 on the Global Positioning System, paves the way for a higher quality signal to be made available to civilian users. This announcement served as a shot in the arm to the already healthy growth shown by new GPS applications and systems deployment now taking place in the civilian sector. Land mode applications of GPS are proliferating and, from the viewpoint of market volume, the Intelligent Transportation Systems (ITS) applications portray enormous potential. This paper first gives a high-level overview of the Intelligent Transportation Systems (ITS) program, primarily based on the ITS National Architecture. A significant number of the thirty ITS services depend on navigation systems. The paper describes the nature of specific ITS services which could use GPS for vehicle location and other purposes. Examples of these ITS applications are: Navigation and Route Guidance, Automatic Vehicle Location (AVL), Public Safety Services, Mayday Relief, Roadway Maintenance, Public Transit, Railroad Operations, Land Surveying, and Automated Highway Systems (AI-IS). Finally, quantification of the specific navigation requirements parameters-such as, accuracy, availability, fix interval, coverage, fix dimension, and capacity-for each of the above ITS and other services/applications is presented in a tabulated manner and then discussed from a comparative point-of-view.
Published in:	Proceedings of the 53rd Annual Meeting of The Institute of Navigation (1997) June 30 - 2, 1997 Albuquerque, NM
Pages:	501 - 509
Cite this article:	Patel, Vijay M., Cairns, William R., "Navigation Requirements for Intelligent Transportation Systems (ITS)," Proceedings of the 53rd Annual Meeting of The Institute of Navigation (1997), Albuquerque, NM, June 1997, pp. 501-509.
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