MELBOURNE, July 26 (Reuters Breakingviews) - General Motors' (GM.N) latest journey in autonomous driving has taken it to the courthouse. Late on Friday, the $80 billion carmaker filed a suit accusing Ford Motor (F.N) of trademark infringement after the latter renamed its new driver-assist technology BlueCruise. The problem? GM has a similar system, in operation since 2017, dubbed Super Cruise, while its $30 billion self-driving division read more is called GM Cruise. The word has, of course, formed part of a generic industry term synonymous for decades with the beginnings of autonomous driving - "cruise control". Granted, Super Cruise, and Ford's new features, go beyond just speed control, allowing cars to maintain and change lanes and speed.