For one reason or another, European railroads have never universally adopted semi-automatic knuckle couplers, a technology that revolutionized operations and improved safety on North America railroads generations ago. We take them for granted. But if you think about it, our system is still labor-intensive, as air brake hoses must be manually connected, and uncoupling is lever-activated, manually. Now it seems as though our European counterparts may leapfrog us, with a technology called DAC, for “Digital Automatic Coupling.”
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