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
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![A trench dug in the road to lay cables for Cable London Limited in Camden, London on October 2, 1991 Stock Photo - Alamy A trench dug in the road to lay cables for Cable London Limited in Camden, London on October 2, 1991 Stock Photo - Alamy](https://c8.alamy.com/comp/2H4J83F/a-trench-dug-in-the-road-to-lay-cables-for-cable-london-limited-in-camden-london-on-october-2-1991-2H4J83F.jpg)
A trench dug in the road to lay cables for Cable London Limited in Camden, London on October 2, 1991 Stock Photo - Alamy
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![Cable/Hose Protection Ramp, 2 channel. For temporary installation. Protecting cables and hoses from vehicles | Barriers Direct Cable/Hose Protection Ramp, 2 channel. For temporary installation. Protecting cables and hoses from vehicles | Barriers Direct](https://www.barriersdirect.co.uk/system/product_assets/paperclip_files/000/037/397/large/279b3003.jpg)