Shockwave Traffic Jam

Watch the following video and complete the listening comprehension exercise below:




Watch this YouTube video on traffic and answer the questions below.

Listening Comprehension, by Patricia Bou

Japanese researchers have conducted a ______-_________ ________ that shows how traffic jams appear for _______ __________ ________.
They placed _________ vehicles on a single __________ and asked drivers to __________ round at a constant speed of __________ km/h.
At first traffic moves __________ but soon the __________ between cars started to __________ and vehicles __________ __________ at one point on the track.
The jam __________ backwards around the track, like a __________ at a rate of about __________ km an hour.
__________ __________ __________ move backwards at about the same speed.

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