07-09-2013, 11:30 PM
Automated Vehicle Locator (AVL) systems use satellite and land communications to display each vehicle's location,status, heading, and speed on the computer's screen. AVL systems use one of four types of navigation technology, or may combine two of these technologies to compensate for inevitable shortcomings of any one technology. The four principal technologies employed for AVL systems are: 1. Global Positioning System 2. Dead-Reckoning System 3. Signpost/Odometer Systems 4. Radio Navigation/Location
