Aurora announced Wednesday that it has begun a pilot test of self-driving tractor-trailers with logistics giant Werner Enterprises. Aurora’s self-driving system – called Aurora Driver – will be operating Werner trucks on a roughly 600-mile stretch of highway between Fort Worth and El Paso.

That particular stretch is an important segment of a heavily traveled truck route between Atlanta and Los Angeles. But according to the companies, it’s a monotonous nine-hour drive that human truck drivers would rather avoid – making it an ideal use case for the Aurora Driver system, which never gets bored..

Werner’s CEO, Derek Leathers, was quick to say that the goal isn’t to replace the company’s human drivers entirely. Instead, as he sees it, self-driving systems like Aurora’s will be able to handle routes that Werner’s human drivers would rather avoid, while expanding the company’s capacity during busy periods.