Introduction about autonomoun car

According to SAE’s(Society of Automotive Engineers) classification of cars, there are 6 levels of it:

SAE   Level



No automation, driver needs to steel by hand all the time, including monitoring environment, acceleration and dynamic driving task.


Driver Assistance, it poses assistance system and can steel and accelerate car, but driver still needs to monitor environment as well as

dealing with dynamic driving tasks.


Partial Assistance, it finishes system steeling car but faces the same problem with Level 1.


Conditional Autonomation, in this level, the car can

steel and monitor by systems, and these systems can change their models. However, some dynamic tasks still depend on human


High Autonomation, well, the high level of automatic car will allow car drive by itself totally, and some driving models can make it more smart.


Full Autonomation, the highest level of automation, which the car not only can be controlled by system, but also be equipped with all driving modes.

Luckily, some companies have designed autonomous cars successfully, like Google and Tesla. Google X lab started to launch the autonomous car project from 2009, and till now, its cars have finished 322 million kilometers driving with city, desert and high way tests. However, all these tests were done in good weather, and it still didn’t finish the cold or snowy condition. But it has already been awarded “mastering 300 humans’ driving experience. For Tesla, it has added some autonomous systems into commercial cars, like Model S. But CEO Elon Musk said drivers still need to focus on steeling all the time.

From the above description of Google X and Tesla, we can judge that Google X can reach SAE’s level to 3. well, majority of driving works are done by systems and human only need to adjust it in some emergency when the car faces difficulty. Obviously, Tesla’s system can only promise to drive without wheel, but it can’t finish monitoring environment and change its models, so it should be described as level 2.

Autonomous cars can apply to various situations in our life. For example, ambulance service, which can bring more benefits to sick people; similarly, the school buses can also be replaced by autonomous cars, and students will have more flexibility to arrange their time; another important example is long-distance bus, which can reduce accident rate because of drivers’ fatigue.




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