Since using the Hoover Dam as a projection screen is probably cooler than the actual truck, I dug up a link that show it. Full article, but the photo in question is halfway down [0].

edit: Found more background and pictures on the projection. Started a new thread so as not to hijack [1].

[0] http://www.trucknews.com/mobile-and-it/freightliners-autonom...

[1] https://news.ycombinator.com/item?id=9504958