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I refer to those smart cars that can distinguish traffic light, avoid walkers or some other work demands intelligence. For these two phase "automatic drive" and "autopilot drive", which is more accurate? and why?

closed as off-topic by Mick, FumbleFingers, Rory Alsop, NVZ, k1eran Dec 29 '16 at 14:36

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    Fully manual -> automatic gearbox -> cruise control -> traffic-aware adaptive cruise control -> lane departure assistance -> Tesla Autopilot -> driverless car. But the more recent technologies are really just temporary intermediate capabilities that probably won't be relevant for long enough that everyone even knows what they are, let alone agrees on what to call them. – FumbleFingers Dec 29 '16 at 12:59
  • SAE International defines 5 levels of autonomy. Six if you include Level 0 which is no automation. sae.org/misc/pdfs/automated_driving.pdf. Autopilot drive is at best marketing words which have no well-defined meaning outside of whatever the marketing department decided they mean. Stick to the SAE levels. – Jim Dec 30 '16 at 6:10
  • Thank you. May be I should go to English Language Leaners site. – Mr.ding Dec 30 '16 at 13:39
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An automatic drive is often used for a car where only the transmission is automatic, i.e. you don't need to manually shift gears.

The phrase autopilot drive makes it more clear that the car is doing (part of) the driving itself, though if it does not need any input from the human driver at all (apart from specifying the destination), it's often called an autonomous car.

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