Tesla has accumulated over 7.9 million miles across its test fleet for the Semi, which is not yet in mass production.Sightings of the all-electric Tesla Semi moving at speed have drawn attention for its futuristic, sci-fi sound during acceleration.Recent reports indicate Tesla is preparing for the production of the Semi in Nevada, with over 1,000 employees and job openings related to the Semi.Tesla has shared updates on the progress of the Semi factory near Giga Nevada, including a new logo design inspired by the Tesla Model 3 logo.