4-4-2 
Information Networks 
GPS 
Car 
Information 
System 
Picture 1 : Product scenario for future integrated traffic management systems 
Traffic guidance systems 
Due to introduction of individual car navigation systems in 1995 
the market for telematic systems and telematic services in Europe 
was initiated. In order to show up the importance of telematic 
information systems in traffic guidance and control it is necessary 
to classify different guidance and navigation systems following 
their technical functionality. 
magn. 
magn. field sensor 
gyro 
azimuth 
digital 
road map 
f*1j diverse 
J L geometric 
data 
wheel 
turn 
difference 
distance 
dead 
reckoning 
correction 
differential 
odometer 
<T^ 
=> 
position 
map- 
matching f - ^ 
algorithm 
1> 
GPS / DGPS 
positioninacoordinates 
Picture 2: Positioning with autonomous car navigation systems