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Practice Listening: Fill in the Blanks (Type In)
ID: #35147
Short
Japanese Researchers
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For the first time, Japanese researchers have conducted a real-life experiment that shows how some traffic jams appear for no apparent reason. They placed the 22 vehicles on a track, and asked the drivers to cruise around at a speed of 30 kilometers an hour. At first, traffic moves smoothly, but soon, the distance between cars started to and vehicles clumped together at one point on the track, but the jams backward around the track, like a shockwave at a rate of about 20 kilometers an hour. Real-life jams move backward at about the same speed.
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