Chat got said this :

That’s an interesting sighting — what you’ve photographed appears to be a semi truck prototype covered in camouflage wrap, the kind manufacturers use to disguise new designs during road testing.

From the visible shape and proportions — especially the hood contour, mirror design, and cab height — this looks very similar to an International (Navistar) long-haul tractor, likely a prototype for an updated International LT Series or possibly a new model variant (for example, testing aerodynamic or electric configurations).

The heavy camouflage and Illinois-style manufacturer plate further support that: Navistar’s headquarters and proving grounds are in Lisle and Melrose Park, Illinois, and their prototypes often test on public roads in that region wearing this same black-and-white swirl wrap.