Nowadays, when car companies launch new cars, they often see a series of driver assistance system functions in the configuration table. Not only car companies regard the capabilities of driver assistance systems as one of the important selling points. Moreover, consumers are paying more and more attention to the functions contained in the vehicle driving assistance system, and as an important reference for the level of vehicle intelligence.
According to the intelligent classification of the car, automatic driving is divided into L0-L5, of which L0 refers to completely manual driving, and L5 refers to the intelligence of the vehicle, which has reached the level of human driving and can handle all working conditions, that is, unmanned driving. At present, the driver assistance system equipped with the vehicle is classified at the L2 level from the level of automatic driving. Therefore, the driver assistance system mainly plays a role in assisting driving, making driving easier in specific scenarios such as following the car, and can also give the driver the initiative to intervene in an emergency to provide help.
But in fact, consumers find that although the driving assistance systems of various brands have many similarities in the functions that manufacturers claim to be able to achieve, they are very different in the actual experience and operation. Therefore, in terms of driver assistance systems, consumers actually need professional standards to evaluate, rather than only listening to the manufacturer's one-sided words.
However, with the launch of ccRT (China Automobile Consumer Research and Evaluation) Assisted Driving Evaluation by China Automobile Evaluation, consumers have a comprehensive understanding of the true capabilities of the vehicle's driving assistance system. CCRT driver assistance evaluation includes two dimensions: performance performance (evaluation system whether it reaches the L2 level of assisted driving level) and driver interaction (evaluation system can ensure that the driver can use it correctly), the former is divided into intelligent driving, intelligent parking and intelligent emergency avoidance sub-evaluation, the latter contains system prompts and driver monitoring sub-evaluation. From the perspective of indicator settings, it includes multiple elements of people, cars and environment, and covers the whole process of consumer cars.
According to CCRT evaluation data, the first batch of 6 popular models such as WEILAI EC6, Xiaopeng P7, BYD Han EV, BMW iX3, Tesla Model 3 and Nezha U Pro were announced, with an average scoring rate of 67.2% for intelligent driving, and the overall performance was not good. Each model has some "bugs" in some common scenarios, if the consumer completely relies on the driver assistance system, but if the driver completely relaxes his vigilance, it will still bring great safety risks, far from reaching the level of complete dependence.
There are many problems with driver assistance systems
CcRT Assisted Driving Evaluation For the evaluation of vehicle driving assistance systems, the focus is not on the number of configurations, but on the judgment and performance of the vehicle based on the most commonly encountered scenarios in the driving process. Including the front car to follow, not only the straight track to follow and follow when turning; there is also the degree of automatic parking, not only horizontal, vertical and oblique parking, not only the parking space line and no parking line; and emergency avoidance contains more diverse situations, such as road maintenance pile barrels, sudden traffic accidents, pedestrians suddenly crossing the road ahead.
Among the performance performance, the overall performance of intelligent driving performance is better, the average scoring rate is 91.7%, and some vehicles have insufficient recognition and response to typical Chinese driving behaviors such as emergency cut avoidance of the front car, sharp deceleration of the front car, plug intrusion of the front car, slowing down of the two-wheeled vehicle, and occupation of the road by the target car.
The inspection standard of automatic parking can be summarized as 4 "no" in layman's terms - the identification is not accurate, the parking is not fast, the parking is not crooked, and the parking is not biased. Judging from the CCRT evaluation results, the overall level of intelligent parking of the 6 models is average, with an overall average score of 65.0%, and the intelligent parking performance advantages of some models are obvious.
Emergency avoidance is also an important assessment index of performance in CCRT assisted driving. Unexpected road construction, traffic accidents, and "ghost probes" in complex road sections often make the owner nervous, which is where the auxiliary driving system plays a role. However, the CCRT test results were disappointing, although many car companies claimed how advanced the driver assistance system was, but the overall performance of the 6 models was not good, with an average score of only 41.5%.
In terms of driver interaction, the driver's monitoring ability is weak. For example, some models have strong intelligent driving ability, but allow drivers to take off their hands for a long time, which has certain safety risks.
In the case of points lost in the auxiliary driving test, at the driving scene end, it mainly occurs in the driving scenes such as the emergency cut out of the vehicle in front of the vehicle encountering a stationary occupied road, the low-speed close-range congestion of the front car, the accident cone barrel on the road, the horizontal placement of the faulty vehicle, and the parking scene such as parking in the oblique parking space and the narrow parking space, and the role of the driving assistance system does not meet expectations. At the consumer end, it is manifested as unclear description of the function of the manual, incomplete early warning mechanism for hand off, unclear display of functional status and insufficient attention monitoring function.
The new standard guides driver assistance systems more efficiently
In response to the performance of the hotspot model assisted driving system did not meet expectations, Zhou Boya, director of the technical management department of China Automobile Evaluation, said: "The crux of the problem is that they have not fully adapted to China's road traffic scene. We recommend that manufacturers prescribe the right medicine, optimize the safety and security mechanism, and improve functional coverage. At the same time, it also continues to call on manufacturers to make accurate and detailed user guidelines. ”
In fact, although the momentum of intelligent driving cars is strong, they still face the problem of uneven product safety performance and excessive publicity of some enterprises, which also brings misleading to consumers and brings new safety hazards in the process of driving. For all kinds of intelligent driving traffic accidents occur from time to time, CCRT experts give eight words of advice - eagerly anticipate, calm use. Intelligent driving is still in the stage of assisted driving, for ordinary consumers, we should adhere to the principle of prudence and moderation to choose and buy a car, which is the key to the safe use of intelligent driving system.
There is a level of publicity on the market, but from the actual test, there is a certain amount of "moisture", intelligent driving is still in the auxiliary stage, far from "automatic". Therefore, for China's road driving scene, it is imperative to have new standards for the effect of the assisted driving system, and it also has an important reference role for consumers to buy a car.
It is understood that CCRT is based on 1 million kilometers of traffic big data, setting evaluation items and standards around typical traffic scenarios in China. At the same time, CCRT also takes into account the driver's experience and cognitive abilities. From consumption decisions to the entire closed loop of everyday use of cars, CCRT provides data and knowledge worth referencing.
In the future, with the further popularization of intelligent driving functions and the application of more advanced autonomous driving products, China Automobile Evaluation will also upgrade the relevant evaluation procedures, and plans to launch China's automatic driving evaluation procedures next year. Not only electric vehicles, but also for new fuel models, whether the ability of the driver assistance system is reliable, and whether some rule logic settings are reasonable, will also be included in the comprehensive evaluation of vehicle capabilities. At the same time, the CCRT test results are linked with some manufacturers, which truly promotes the more reasonable and effective driving assistance function of the vehicle.