U.S. 1

U.S. 1 is the name of a sentient semi-truck belonging to Ulysses Solomon ("U.S.") Archer, a cyborg trucker. As a convoy of Autobots drove to investigate a mountain fortress the Decepticons had constructed in Oregon, US1 drove past them on an overhead, and did not involve itself in their inter-stellar conflict. U.S. Archer himself was not seen, but was presumably in control of the truck at the time.

From Teletraan I: The Transformers Wiki, a Wikia wiki.