A red Tesla semi-truck was spotted in California hauling a load of Tesla Model Y and Model 3 cars.

The truck was delivering Tesla cars to customers in California.

In a Tweet, Elon Musk said that Tesla semi-trucks can deliver Tesla cars to within California.

The Semi is boasted as being the “safest, most comfortable truck ever.” It has a 20 second 0-60 mph acceleration with 80k lb and gets 500 miles on a full charge.

Tesla announced plans for its Semi Truck in 2017 with intentions to be available to customers by 2019. After additional delays, Tesla announced that their electric class 8 trucks wouldn’t be produced and delivered until 2021.

“It’s time to go all out and bring the Tesla Semi to volume production. It’s been in limited production so far, which has allowed us to improve many aspects of the design. Production of the battery and powertrain would take place at Giga Nevada, with most of the other work probably occurring in other states. Jerome and I are very excited to work with you to bring this amazing product to market,” Musk said in the leaked memo sent to employees.