Holographic screens on the windshield can be dangerous

Traffic on a highway and the observation of holographic display (HUD) on the windshield of your car can make you feel like a pilot of any jet fighter.

It would seem, is a good thing, allowing you to keep full control over your car and at the same time to warn you against different types of hazards. However, a recent scientific study conducted by experts from the University of Toronto shows that HUD really adds no safety, but rather the opposite — can seriously reduce it.

Holographic displays that appear on the windshield of the vehicle may be configured so that they can be given very different information from the messages about incoming calls and ending with warnings of a possible collision from behind suddenly began to slow down the vehicle ahead of you. Due to such broad information content, according to scientists from the University of Toronto, conducted an experiment with drivers-volunteers, holographic displays are by their nature likely to distract rather than help the drivers. And in order to absorb the entire output information, drivers have what is called "one eye" to distract your eyes from the road, trying to "second" to understand the cause of warnings.

"Drivers have to divide their attention for the perception of visual information," says Professor of psychology and head of research Ian Spence.

"And in this case, it is necessary to monitor not only what is happening on the road around the car, as is usually the case, but also to pay attention to what the warnings are displayed on the holographic screen on the windshield".

To determine the level of impact on the driver's attention new information that appears in his field of vision, Professor Spence and his team of students created two tests. The first test provides volunteers several computer tasks whose task is to accurately determine the number appearing on the screen each time randomly gathered in a group of points. In addition, the screen randomly appears and a black square, on which the subjects must also report. The second stimulus appeared at the same time point, however, he appeared not in all trials.

When calculating the results, the researchers came to the conclusion that when on the screen appeared only the points (no black square), the subjects accurately indicated the number of them. However, when along with a small number of points appear a square, in one of the 15 cases, on average people didn't see it. When you add the number of dots and the appearance of squares difference error increased to about one case out of ten. In addition, regardless of whether square or not, adding points people also decreased the accuracy in their calculations of the correct amount.

The obtained results have led scientists to the conclusion that the level of attention of the driver on the primary problem is reduced proportionally to the number of appearing of a secondary task requiring attention. In reality, this can mean that drivers may not be able to adequately and effectively respond simultaneously to multiple tasks and to choose and to solve these problems according to their priority. In other words, drivers who have to take several displayed on the holographic screen warnings, sooner or later can receive information about the outside temperature is more important than, for example, at the same time deriving information about the approach to the obstacle on the road. Their brain becomes overloaded.

"In such cases, a situation may arise when a person will quickly have to make a decision about the importance of the information supplied. In the end, he will not be able to properly prioritize the recommendation to the next turn and a collision warning", says Professor Spence.

"The presence of several warnings in this situation are much more dangerous than a complete lack of them".

In the second test, the researchers asked volunteers to identify geometric shapes that appeared together with points. In this case, a triangle, a square and a polyhedron is displayed at different times, but without prior warning, as if the information were displayed on a real holographic screen in real conditions.

As in the first experiment, an increase in the number of points on the screen, people generally ceased to see the emerging shape. Also, very often failed to correctly identify the shape and count the dots became much more complicated with the sudden appearance of additional figures.

"Effectiveness of attention during the counting of points and the appearance of the figures was reduced by 200 percent," says Spence.

"Two tasks on the visual perception interfere with each other, and the result was decreased as the reaction and the accuracy of their performance. Ignored warnings and slow response errors can be serious obstacles to maintain safety. Moreover, such warnings can often occur at a time when the driver is already busy performing a certain task. Efficiency in this case can fall dramatically". published

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Source: hi-news.ru/technology/golograficheskie-ekrany-na-lobovom-stekle-mogut-predstavlyat-opasnost.html


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