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.
66. On roads painted with chevrons, drivers tend to feel that ________.
A. they should avoid driving fast.
B. they are driving in the wrong lane
C. they should slow down their speed
D. they are coming near to the speed limit
67. The advantage of chevrons over straight, horizontal bars is that the former ________.
A. can keep drivers awake
B. can cut road accidents in half
C. will look more attractive
D. will have a longer effect on drivers
68. What does the American Automobile Association Foundation for Traffic Safety do?
A. change the road signs across the country
B. try out the Japanese method in certain areas
C. replace straight, horizontal bars with chevrons
D. repeat the Japanese road patterns
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