A subtly redesigned Tesla semi truck prototype was spotted in California this week. 

The updated electric semi truck prototype was spotted on a trailer in Sacramento, California on February 1st, and is thought to have been heading to the Tesla factory in Reno, Nevada. 

Although Tesla has not spoken out about the design updates, Tesla enthusiasts have pointed out changes in the head and tail lights, as well as some slight tweaks on the front windshield and an apparent streamlining of equipment inside of the cab. 

The new prototype now boasts smoked headlights, an updated tail light design, an extended windshield, and new door handles. These are the first noticeable style changes since the Tesla electric semi prototype made its real-world testing debut in 2017. 

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