There are two main types of gps vehicle tracking systems and gps fleet tracking systems available. first one is Passive and other is real time. Passive type is known for storing information regarding time, speed, direction. and other driving habits. Then this memory is downloaded and stored in a computer through satellite. Real Time vehicle tracking sends data at regular intervals to the manufacturer's database. This data can also be sent to user & user reads the information through a website. There are some other gps vehicle tracking & gps fleet tracking that sends information directly in real time to the sender.