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Title	IN-VEHICLE NAVIGATION SYSTEM MODEL DEPLOYMENT INITIATIVE DESIGN DOCUMENT. VERSION 1.0
Accession No	00933865
Corp. Authors / Publisher	Texas Department of Transportation ; Southwest Research Institute
Publication Date	19980107
Description	69 p.; Figures(67); References
Languages	English
Abstract	Real-time in-vehicle navigation is a significant traveler information service added to the TransGuide system during the Model Deployment Initiative (MDI). The TransGuide In-Vehicle Navigation (IVN) system includes an IVN unit that provides travelers with route guidance, vehicle position, and regional points of interest information. Units currently available on the market utilize a database of transit times for each road segment to calculate the shortest travel time from where the vehicle is located to a point the driver inputs as the destination. These databases are static, as they contain typical transit times that by definition cannot account for real-time congestion caused by traffic accidents, rush hours, public events, etc. The MDI implementation of IVN addresses this shortcoming by providing the units with real-time traffic data. The system includes the infrastructure necessary to deliver the real-time information to vehicles in the San Antonio area and the initial deployment of 590 IVN units that utilize the real-time traffic data. The purpose of the IVN system is to communicate real-time traffic information maintained at the TransGuide Traffic Management Center (TMC) to travelers in the San Antonio metropolitan area and present the information in a manner useful for making navigation decisions. This is the design document for the IVN system.
TRT Terms	Advanced traveler information systems ; Automobile navigation systems ; Decision making ; Design ; Highway traffic ; Position indicators ; Real time information ; Route guidance ; Traffic congestion ; Traffic data ; Travel time
Geographical Terms	San Antonio (Texas)
Identifier Terms	Model Deployment Initiative; TransGuide
Subject Areas	H54 OPERATIONS AND TRAFFIC CONTROL; I73 Traffic Control
Availability	Texas Department of Transportation
URLs	Document: http://www.transguide.dot.state.tx.us/mdi/IVN_SDD.pdf
TRIS Files	HRIS
Database	TRIS Online

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