A YouTuber captured a large truck carrying Boeing aircraft wing spars in Everett, Washington, but how they did it is not something you see everyday.
Two drivers are steering the rig, one in the cab in the front like normal, and another driver in a small cab just in front of the rear wheels of the trailer. The rear driver helps steer the trailer during problematic turns, especially on local streets.
It’s slightly more common to see the rear being controlled via remote control, however having an actual driver there makes controlling the rear even more precise. The truck is also accompanied by the normal pilot vehicles you’ll see with most oversize loads.