Results of a Study Into the Utility of Carrier Phase GPS for Automated Highway Systems

Randal Galijan, James Gilkey, and Richard Turner

Abstract:	The Federal Highway Administration (FHWA) of the U.S. Department of Transportation (DGT) is supporting development of Automated Highway Systems (AI-IS) to lessen the occurrence and severity of vehicle collisions, increase the efficiency of transit systems, decrease mobile emissions, and provide greater passenger comfort and increased mobility for all potential AI-IS users, including disabled drivers. This paper presents results of an AHS Precursor Systems Analysis (PSA) study that SRI International has perfomwd for FHWA concerning the capability of the Global Positioning System (GPS) to provide data for lateral and longitudinal control of AHS vehicles. Tbe paper discusses AI-IS lateral and longitudinal requirements and an initial GPS system configuration for AHS. presents GPS augmentation techniques that are expected to pmvide continuous data (even when GPS satellite signals are occluded by buildings, bridges, and tunnels), and presents GPS data collected in a typical AHS environment. Carrier phase GPS tracking techniques are expected to satisfy many AHS data requirements. Additional study is required in several areas--e.g., augmentation, map databases, datalinks. and integrity monitoring. These areas of study are discussed as well.
Published in:	Proceedings of the 7th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1994) September 20 - 23, 1994 Salt Palace Convention Center Salt Lake City, UT
Pages:	533 - 541
Cite this article:	Galijan, Randal, Gilkey, James, Turner, Richard, "Results of a Study Into the Utility of Carrier Phase GPS for Automated Highway Systems," Proceedings of the 7th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1994), Salt Lake City, UT, September 1994, pp. 533-541.
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