Universally applicable, in-motion and automatic toll paying system using microwaves

摘要: Toll collection facilities for tunnels, bridges and turnpikes slow traffic, waste time fuel, increase air pollution. Eliminating the need a toll payment stop would avoid this reduce facility operating costs. A single, universally applicable system apparatus is described that can eliminate most stops simplify funds transfers. The starts with lump sum paid in advance to permanently assigned agency's representative. This inserted, electronically, into memory of microwave transponder-data-processor, normally kept vehicle. As vehicle passes suitably equipped facilities, transponder receives billing information from transponder, calculates toll, transmits it back where electronically subtracted stored balance. If resulting balance not negative, pass signal flashed. transponder's permanent includes vehicle-owner code, agent's code vehicle-class code. availability plus procedure increasing pre-paid makes possible computerized automated double entry bookkeeping transfer system. Security achieved by crypto insertion codes. current always indicated liquid crystal display.