Electronic billboard and vehicle traffic control communication system

Abstract From the Canadian patent

A communication system uses simple microwave transmitters disposed along roadways and in-vehicle mounted receivers to transmit encoded signals to produce location-specific commercial, traffic regulatory emergency, and other information to operators of motor vehicles. An optional remote interface links transmitters to regulatory and commercial users in real-time. A microprocessor in the receiver uses the coded signals to produce messages from prerecorded messages or from message parts stored in a replaceable memory device, and to provide the messages either audibly, visually or both. The microprocessor functions under operator supplied instructions to select certain message types for display …