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The driver is able to comprehensively observe the situations
of the vehicles on both sides of the road through the rearview
mirror when driving a normal vehicle. However,due to the great
length of truck body, With a purpose of reducing the probability
of large truck accident greatly, this design adds the ultrasonic
sensors on both sides of the truck body, which enablesthe driver
to see the warning lights through the mirror that are lit only
when pedestrians or vehicles keep a close distance .
Dalian Minzu University