An Example of Off-Tracking

James R. Schmidt, Jr., BSME, Sr. Collision Reconstruction Engineer
A tractor-trailer making a turn undergoes noticeable off-tracking. Specifically, the trailer tires track well to the inside of the path followed by the tractor tires. In this real-world example, a tractor-trailer was making a tight right-turn at a busy intersection. The turn was close to, but a bit less than, 90 degrees. The turn was captured on a dash cam, from which a series of still images have been saved.
First, the tractor-trailer (at the right side of the photo) approaches the intersection:
Then, the tractor swings wide:
…and makes its turn:
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