Tesla’s awaited next phase in self-driving trucks has been much-discussed since the unveil of the Model 3 electric car in July. Now, CEO Elon Musk has given a target date for an unveiling and the first slate of test drives of his company’s next expansion in automotive transportation.

In a tweet Wednesday, Musk said the Tesla Semi is penciled in for an October 26th unveil at its Hawthorne, California facility.