What is the purpose of those long and thin black cables that stretch across public roads that typically attach to an electronic looking box on the side of the road attached to
Road works city of London, dug up road with cables in central london Stock Photo - Alamy
Why You Sometimes See Black Tubes Stretched Across the Road | Mental Floss
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What Are Those Black Cables On The Road?
Sometimes I see these wires go across the road. What purpose do they serve? : r/whatisthisthing