Quick answer
The San Francisco cable car system is the last manually operated one in the world. Cars carry no engine; a steel cable runs in a slot under the street at a constant 9.5 miles per hour, and the gripman closes a set of jaws onto it. Andrew Smith Hallidie tested the first line, the Clay Street Hill Railroad, at 4am on August 2, 1873.
Full transcript
Four in the Morning
On the second of August, 1873, at four in the morning, a Scottish-born engineer named Andrew Smith Hallidie stood at the top of Clay Street and prepared to test something nobody had built before. Hallidie made wire rope for the mines, and he had an idea: run that rope in a slot under the street, keep it moving, and let a car grip it to be pulled uphill. He raised the money largely from people who lived on Clay Street and wanted the hill solved. The test worked. Regular passenger service on the Clay Street Hill Railroad began on the first of September that year, and the fare was five cents. Look at the steepness of the block in front of you and imagine a horse trying to climb it in the mud. Then imagine what it meant to never need that horse again.
The Horse's Failure
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What the Gripman Does
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The Great Winding Wheels
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The Lines That Survived
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The 1947 Fight
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The Car That Started It All
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Hallidie's Real Job
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The Sound of the System
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The California Street Line
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The Physics of Nine and a Half
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The Turntable
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