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In the 1970s and ’80s there was a strong trend toward “total information” systems built around the computer. ComputersĪ major reason for the growing use of microwave and optical-fibre systems was the tremendously increased demand for circuits that developed from the railroads’ widespread use of electronic computers.Įarlier, railroads had been among the leaders in adopting punched-card and other advanced techniques of data processing. The high-capacity optical-fibre cable, lightweight and immune to electromagnetic interference, can integrate voice, data, and video channels in one system. More recently many railroads have adopted optical-fibre transmission systems. Other railroads all over the world turned to microwave in the 1970s and ’80s. As early as 1959, the Pacific Great Eastern Railway in western Canada began to use microwave radio for all communications, doing away almost entirely with line wires. Supervisory personnel often use radio in automobiles to maintain contact with the operations under their control.Īs the demand for more railroad communication lines has grown, the traditional lineside telegraph wire system has been superseded.
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Through its use, widely separated elements of mechanized track-maintenance gangs can maintain contact with each other and with oncoming trains. In terminals two-way radio greatly speeds yard-switching work. It also is the medium for automatic transmission to ground staff of data generated by the microprocessor-based diagnostic equipment of modern traction and train-sets. In train operations radio permits communication between the front and rear of a long train, between two trains, and between trains and ground traffic controllers.
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Railroads began experimenting with radio at a very early date, but it became practical to use train radio on a large scale only after World War II, when compact and reliable very-high-frequency two-way equipment was developed. Today, the railroads are among the larger operators of electronic communications systems. Railroads were among the first to adopt the electric telegraph and the telephone, both for dispatching trains and for handling other business messages. It is not surprising, therefore, that railroads have been among the pioneers in the use of improved methods of communication and control, from the telegraph to the computer and automation techniques.
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