MER Clinic: Signals and Detection

Flashing lights, crossing gates, and trackside signals all provide visual interest to a model railroad. They can also inform the operators about track conditions to guide operations. This clinic describes installing and use of occupancy detection using current sensing and optical detectors used to control crossbuck flashers, crossing gates, and trackside signals and repeaters for Automatic Block Signaling (ABS). Products and installation are discussed and available products are surveyed.

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