NTL Record

Title	High Accuracy-Nationwide Differential Global Positioning System Program Fact Sheet
Record ID	81103
Corporate Creator	United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center
Publisher	United States. Department of Transportation. Federal Highway Administration, Turner-Fairbank Highway Research Center
Publication Date	20030100
Language	English
Abstract	The High Accuracy-Nationwide Differential Global Positioning System (HA-NDGPS) program provides the capability to broadcast corrections to the Global Positioning System (GPS) over long ranges to achieve a better than 10 centimeter (cm) (95 percent) accuracy throughout the coverage area. HA-NDGPS is currently undergoing a research and development phase. The signal is available for test purposes from Hagerstown, MD, and soon Hawk Run, PA. Application of this technology will provide advanced safety features for transportation, including lane departure warning, intersection collision warnings, and railroad track defect alerts. It also could be used for economic enhancements such as precision container tracking and automated highway lane striping. Currently, the GPS service offers a 4- to 20-meter (m) navigational accuracy. For many land transportation uses, this accuracy is insufficient. The Nationwide Differential Global Positioning System (NDGPS) offers a 1- to 3-m radio-navigational service that meets the needs of many more transportation users.
Rosap ID	dot:56321
Rosap URL	https://rosap.ntl.bts.gov/view/dot/56321
TRT Terms	Global Positioning System; Accuracy; Defects; Highway safety; Warning systems; Railroad tracks
General Subjects	Highways; Planning and Forecasting; Railroads; Safety and Human Factors
Geographical Coverage	United States
Report Number	FHWA-RD-03-039
Resource type	Brief
URL	https://ntlrepository.blob.core.windows.net/lib/81000/81100/81103/FHWA-RD-03-039.pdf
Format	PDF
Database	NTL Digital Repository