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Union Pacific Corp. says new technology meant to prevent train accidents is causing congestion on the railway.

The largest U.S. railroad based on revenue is in the midst of implementing positive train control, or PTC, technology, which is designed to automatically stop a train to prevent collisions or derailments. But activating the system in certain areas is causing problems as the railway works out kinks in how it operates.

Source: Union Pacific CEO: Train Braking Technology Is Clogging the Railway | Fox Business