When I was at a GPS shop in '99, the back lot already had Case and Cat farm and mining equipment in fully-autonomous mode. The challenge being worked on at the

When I was at a GPS shop in '99, the back lot already had Case and Cat farm and mining equipment in fully-autonomous mode. The challenge being worked on at the time was handling traffic between vehicles. The other one was that having non-controlled human vehicles with transponders would be way more complicated. It's simpler to just have all automated or nothing.