Written | Little Magic
Since the start of car equipped with cruise technology, the driving of the people will gradually become comfortable.
In particular, with the advancement of technology, the previous set of speed cruise is upgraded to a smarter ACC cruise, the driver after the steering wheel has become more easier.
The US “Consumer Report” has launched a user research on the “advanced security system”, including 85% of the owners feel the ACC “Very satisfied”; 19 percentage users said that ACC cruise has helped them successfully avoid the occurrence of traffic accidents; for the trust of the ACC function, 72% of users have given the “very trust” answer.
In this way, ACC acts as an extremely practical driving assistance is not only welcomed by the owner, but also the functions they frequently. However, in the security, is this system play a full positive role?
The American Road Safety Insurance Association (IIHS) has some objections, which has recently been studied: ACC is becoming the speed of the driver, which may reduce the potential security advantage of this feature.
The study showed that the ACC cruise is opened in the journey compared to the driver without the use of ACC and related driving assistance, and even with the lane Some automatic driving assistance systems make it easy for drivers to speed up. 
When the driver sets with the car distance, they basically ignore their speed, resulting in speeding at certain sections.
The first author of the study, IIHS statistics sammonfort said: “ACC does have some security benefits, but it is important to consider that the drivers may disappear these advantages by abuse the system. Knowing that the speed of the crash is one of the most important factors that determine whether the collision is fatal. “
ACC adaptive cruise is a more advanced version of traditional fixed-speed cruise, which uses sensors to calculate and maintain a pre-selected and car distance from the front-end, no driver repeated brakes and reset systems. As the function is added to the lane, the vehicle will also keep it in its lane.
At present, the driving assistance system on the market does not limit the speed of the driver’s settlement above the legal speed limit, and these driving assistance systems themselves can also leave the driver’s continuous monitoring, because they can’t handle us. To compare some common road environment and driving scenarios.
However, the analysis and other studies of the IIHS subordinate road loss data have shown that ACC may reduce the risk of crash. . Other studies have proved that these systems are larger than that of most human drivers, and they will significantly reduce the frequency of the driver overtaking and variability.
In order to figure out the impact of the ACC and lane-centered function, IIHS researchers use the data collected by the Advanced Vehicle Technical Alliance of the Massachusetts Institute of Technology to analyze the driving behavior of 40 drivers in the 4th week of the 4 weeks of data. .
These drivers driving 2016 roads with an ACC function. And 2017 Volvo S90 equipped with ACC and Pilotassist features. Volvo’s Pilotassist is a partial automatic driving assistance system in conjunction with ACC and lane.
Data show that when these systems are started, the driver has increased the possibility of speed on the highway at the speed limit of 24%. When using driving assistance compared to manual driving, their speed is higher.
Whether it is manual driving or using an ACC or Pilotassist, in a section of speed limit 88km / h, the overspere exceeds the maximum amplitude speed. In these areasDomain, the average speed of the overspere exceeds about 13km / h.
In contrast, the average speed of the speed is about 8km / h at a speed limit of 96km / h and 105km / h.
The degree of influence of the ACC on the speed of the speed at a segment of the speed limit is 88 km / h. When these slower speed limit areas, when using an ACC or Pilotassist, the average speed of the driver is approximately 1.6 km / h by manual driving.
1.6km / h This number may not sound much. Open these features may not talk about any other impact on the risk of car accidents, however, according to a calculated possible crash result general formula, ACC and part of the user who have a fatal accident in the use of some automatic driving assistance systems should have a higher risk of approximately 10%. However, this study did not analyze the real world car accident.
Monfort Summary to: “The faster the faster, the more dangerous,” 
This study did not consider several other frequent crash frequencies and serious The degree of factors.
For example, it is possible to select a farther heel distance to the driver that sets the system in a higher speed. Compared to the speed of the ACC system, the response speed at the front speed will respond more naturally.
It is clear that IIHS current research is not sufficient, and future research will need to balance the impact of these benefits and speeding between ACCs to fully understand what effect on the security.
If the maximum vehicle speed is limited or associated with the public limit, the driver who does not completely prevent the adventure from using the ACC to drill the empty space. Then let the system strictly probably the answer.
LastWhat to say is, these two test system itself can make the driver to increase the speed of the speed or decreased by 8km / h, which may explain at least to some extent why the driver opens the ACC. There are so many regulations that are exceeded. [IDailycar]