The agreement with Germany-based Traton marks TuSimple's first move into Europe. It follows a similar agreement TuSimple struck in July with Navistar International Corp. to jointly develop self-driving trucks, with the U.S. truck manufacturer also taking a minority stake in the startup. Traton, whose truck brands include Scania AB and MAN SE, holds about 17% of the shares in Navistar and is seeking to acquire the Lisle, Ill.-based manufacturer. Top news and in-depth analysis on the world of logistics, from supply chain to transport and technology. Traton and TuSimple didn't disclose the size of the stake the European manufacturer is taking in the company.