Another word for cars

Behind it, sixteen cars were jammed together all the way back to the highway.

We had to change cars at Philadelphia; but we did not mind it much.

She gripped the armrest as he passed two cars at a time.

Water streamed through the gutters, and those cars out in the storm crawled block-to-block.

Go up the hill and watch for cars so you can warn anyone before they get to the curve.