What we know about the Tesla semi truck before the Thursday reveal

Tesla’s big year (the good and the bad) isn’t over yet. The company is set to unveil its Class 8 semi truck prototype Thursday night at its Hawthorne, California facility. While perhaps not as critical to the automaker as its new mass-market Model 3, the Tesla semi truck announcement will mark yet another turning point and big test for the company.
But why is Tesla’s next act a semi truck? That question has become more important as the second half of 2017 for Tesla has appeared