Cruise control does not press the accelerator like a tiny invisible foot.
It runs a feedback loop between speed sensors and the engine.
The car constantly measures wheel rotation to know its real speed.
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If the car climbs a slope and slows down, the system increases throttle automatically.
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If the car goes downhill and speeds up, it reduces throttle.
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All of this happens dozens of times every second.
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Your cruise control is not driving the car.
It is correcting speed errors in real time.
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