Now the American Automobile Association Foundation for Traffic Safety in Washington D.C. is planning to repeat Japan s success. Starting next year, the foundation will paint chevrons and other patterns of stripes on selected roads around the country to test how well the patterns reduce highway crashes.
Excessive speed plays a major role in as much as one fifth of all fatal traffic accidents, according to the foundation. To help reduce those accidents, the foundation will conduct its tests in areas where speed-related hazards are the greatest curves, exit slopes, traffic circles, and bridges.
Some studies suggest that straight, horizontal bars painted across roads can initially cut the average speed of drivers in half. However, traffic often returns to full speed within months as drivers become used to seeing the painted bars.
Chevrons, scientists say, not only give drivers the impression that they are driving faster than they really are but also make a lane appear to be narrower. The result is a longer lasting reduction in highway speed and the number of traffic accidents.
这篇文章一共6段,应该按观点分述型文章来找主题。即首段观点+末段观点。所以该片文章的主题是optical illusion (错觉) can cut highway crashes,而这种optical illusion (错觉)来自一种新的路面设计Chevrons,这种设计可以让驾驶员自动减速从而减少高速公路上的交通事故。这篇文章考到了主旨题:
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