Word forms: (regular plural) semitrailers
( Automotive engineering : Vehicle types )
A semitrailer is the long rear section of a truck that can bend when it turns.
The truck driver was slightly injured when his semitrailer overturned.
Heavy trucks and semitrailers account for about 15 percent of all traffic along the highway, yet make up 25 percent
of all vehicles involved in fatal crashes.
Traffic was halted for an hour in the snow after several semitrailers that had stopped to put on chains had trouble getting going again.
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