Highway Traffic and Road Safety

 

Transportation Terms - K

 

 

 

 

 

 

Kingpin (axle) Pin around which a steer axle's wheels pivot.

Kingpin (trailer) Anchor pin at the center of a semi trailer's upper coupler which is captured by the locking jaws of a tractor's fifth wheel to attach the tractor to the semi-trailer.
 

 

 

Transportation Terms - K

 

 

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