Since it's not feasible to lay track everywhere, and since this could be implemented in software, it could be an achievable, relatively cheap, and possibly near

Since it's not feasible to lay track everywhere, and since this could be implemented in software, it could be an achievable, relatively cheap, and possibly near term, improvement. "Long range" road trains could include some hardware. This isn't some new idea [1], so I'm not sure why I'm being downvoted. This has always been a goal for self driving. 1. https://www.motorauthority.com/news/1076588_sartre-self-driving-road-train-takes-to-public-roads-video https://www.motorauthority.com/news/1076588_sartre-self-driv...