Lenna Nguyen

# Different types of technology in autonomous vehicle: Autonomous Vehicles (AVs) use combinations of technologies and sensors to sense the roadway, other vehicles, and objects on and along the roadway. The key technologies and sensors are described in the figure below.  * A combination of sensors: Cameras are a relatively inexpensive type of sensor that can provide the basic visual information a human would gather as he or she drive; multiple cameras are used to provide depth of field. Radar  (Radio detection and ranging) already used for certain level 1 vehicle controls;  Both short-range and long-range automotive-grade RADARs are used (mostly in the narrow-band i.e. 27–77 GHz) for AD applications. Short-range radars, as the name indicates, ‘senses’ the environment in the vicinity of a car (~30m) and, especially at low speeds; whereas, long-range radars cover relatively long distances (~200m) usually at high speeds. Generally, the radar sensor acquires information from nea

#SAE International has a formal classification system for autonomous vehicles, ranging from level 0 (not automated) to level 5 (fully automated), specificly: Level 0 (No automation) : The car is totally controlled by the drivers  . But there can be some warning systems (blind-spot and collision warnings). Level 1 (Driver assistance) :  In this level, v ehicles    can handle one task such as steering, throttle, or braking, but not in all circumstances, and the driver must be ready to take over those functions if called upon by the vehicle. Level 2 (Partial assistance) : The car can handle much more than one task( steering, throttle, and braking ) but immediately let the driver take over if he detects objects and events the car is not responding to: the surroundings, traffic, weather, and road conditions. Level 3 (Conditional assistance) : The car monitors surroundings and takes care of all steering, throttle, and braking in certain environments, such as freeways. But the driver