Companies in the US don't like open protocols or standards, and will push their own proprietary systems in the hope that the market adopts it so it can be licen

Companies in the US don't like open protocols or standards, and will push their own proprietary systems in the hope that the market adopts it so it can be licensed to everyone else that wants to use it. Ideally, cars that need to drive on roads with human operators should be depending on their surrounding and conditions, not some secondary signals about those surroundings and conditions. As long as roads go through places that people live and work in, humans will be on the roads as drivers, pedestrians, cyclists, etc.