You can make a rule, just like ships already are doing: > When two power vessels are approaching head on,both vessels should alter course to starboard to pass

You can make a rule, just like ships already are doing: > When two power vessels are approaching head on,both vessels should alter course to starboard to pass port-side to port-side. > When two power-driven vessels are in crossing situation on a collision course, give way to the vessel to starboard (right).The give way vessel must take early and obvious action to avoid a collision by either stopping or altering course to starboard. https://maritime.college/Boating-Rules.php https://maritime.college/Boating-Rules.php --- Plus, driverless cars can potentially use more efficient short-range radio and figure out themselves.