UPS has had autonomous trucking startup TuSimple hauling cargo for it between Phoenix and Tucson, Arizona, since May as part of a newly publicized partnership between the two companies.

from https://www.theverge.com/2019/8/15/20805994/ups-self-driving-trucks-autonomous-delivery-tusimple
https://cdn.vox-cdn.com/uploads/chorus_image/image/65022936/TuSimple_Self_Drving_Truck_4_copy.0.jpg