司机的眼部运动可透露其如何过弯路-凯发k8官网

it is well-documented that when negotiating ¹ roads, drivers tend to look at a specific, well-defined point on the lane marking — referred to as the tangent point（切点） . new research finds that the further drivers can look ahead, generally in left-hand curves, wide curves and when leaving a curve, the less they have to look at the tangent point. alternatively, when drivers enter or ²（机动，调遣） through a right-bound curve, where they see less roadway ahead, they will spend more time looking at the tangent point. these findings are reported in a recently published article, "car drivers attend to different gaze targets when negotiating closed vs. open bends," in the journal of vision.

"the ultimate goal of the project is to build a device into cars that warns the driver if he is in danger of unintentionally（无意地） departing from the lane," says author farid i. kandil of the department of ³, university of münster, germany.

in the study, six drivers test-drove a car repeatedly through a series of 12 right- and left-hand bends, or curves, on real roads while their eye movements were recorded. the results confirmed that when moving into a curve, drivers rely heavily on using the tangent point before turning the ⁴ wheel. the findings further revealed that a driver will look at the tangent point 80 percent of the time when there is a shorter sight distance, such as with sharp, right-hand curves. in open bends such as left-hand curves, and when leaving curves, drivers spent a third of their time looking at the end of the curve and the straight road that comes after.

the experiments were conducted in right-hand traffic as in ⁵ europe and the united states. according to the researchers, there are many hints suggesting that the results can also be used to predict how drivers negotiate curves in left-hand traffic.

"the system we envision will look out for（设法得到，留心） upcoming curves and ⁶ information about the eye movements the driver normally performs," explains kandil. "if the driver does not show his typical pattern of eye movements upon approaching a bend, then the system will assume that he has not seen it and will warn him in time."

the research team plans to conduct additional experiments, using a prototype to determine whether the warning system provides enough time for the driver to react properly.