This may not be the most visible, but it's a Model 3 with California MFG plates, near Salt Lake City, UT. There was a black Model S, also with California MFG plates, tailing it. The seats were black, and regular brake calipers. Seems odd that Tesla would be road-testing a "regular" Model 3 so far from home, so far into production, so I'm hoping and speculating it was an AWD.
Would that be on Interstate 80 that goes from Fremont to NYC? Potential parking lot to parking lot trip?