Patent ID: 6633808
Filing Date: 2003-10-14
Classification: G08G,H04H

Abstract:
A process for transmitting traffic data pertaining to a highway network from a traffic data control center to at least one terminal, said process comprisingproviding a digital map database of a highway network in the form of a traffic file in the traffic data control center and in the terminal, representing sections of streets, lanes, and groups of lanes as segments in said digital map database, combining data pertaining to a chain of said segments which follow each other in numerical sequence in said highway network, said data being combined in said control center into a traffic data packet containing (a) an identifier symbol representing the identity of the segment at one end of the chain, (b) a numerical chain segment symbol representing the total number of segments in numerical sequence in the chain, (c) at least one condition symbol, including a last condition symbol, representing the condition of at least one of said segments in said chain, and (d) a pointer for at least one of said segments, said pointer indicating which one of said segments follows each said at least one of said segments in a direction of travel; and transmitting said data packet from said traffic data control center to said at least one terminal.