Automatic Vehicle Location Successful Transit Applications. A Cross-CuttingStudy. Improving Service and Safety

摘要

Automatic vehicle location (AVL) is a computer-based vehicle tracking system. Fortransit, the actual real-time position of each vehicle is measured and its location is relayed to a control center. Actual position determination and relay techniques vary, depending on the needs of the transit system and the technology (or technologies) chosen. Typically, vehicle position information is stored on the vehicle for a time, which can be as short as a few seconds or as long as several minutes. Position information can be relayed to the control center in raw form or processed on-board the vehicle before its transmission.