VEHICLE POSITION DETERMINATION SYSTEM & METHOD

摘要

A vehicle position determination system for determining the position of a moving vehicle having a transponder includes a first and second antennas operable to receive periodic radio frequency data signals from the transponder when t he transponder is moving through a first or second predetermined coverage zone, respectively. The first and second coverage zones partially overlap and each have a width that is orthogonal to the travel path of the moving vehicle and a length that is parallel to the travel path of the moving vehicle. A processor counts the number of periodic data signals received by each of the antennas from the transpond er during a time period and determines based on the count a probable location o f the vehicle. The vehicle location information can be provided to an imaging syst em to discriminate between transponder and non-transponder equipped vehicles.