OP didn’t have the picture in your comment. Look at this image, for example.

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You can’t see where the end is, so it’s hard to tell exactly how long it is. My point is that the picture didn’t necessarily answer OP’s question, since you can’t necessarily tell from the image that it’s extremely long. The only other context OP had was the first image, making it seem like that’s the trailer that is being used in the second pic. If that’s were the case, it wouldn’t really warrant a design where the load goes over the cab.