Rather than building their own trucks, Otto is hoping to make hardware kits for existing truck models that would either be installed by service centers, or possibly at the factory if the company is able to forge manufacturer partnerships. Unlike Google’s self-driving car project, Otto would at least initially focus on highway driving, which account for the overwhelming majority of a typical truck route; the human drivers would still handle surface streets, loading, unloading, and the like. Right now, the company is testing with the Volvo VNL 780, but hopes to work with many so-called Class 8 trucks, which are the largest, heaviest trucks on American roads.