Come on Sam, like that's never been done before? 'Bleeding Edge' much?
Of course it's decades away. We're looking at a complete infrastructure revamp here. A 100% revamp. Every road in every podunk town across the fruited plains. What about all of the unpaved roads? These such roadways change at times with just a run to the store and back. This is just the same sort of BS that comes with the Electric Cars, which will be even more decades working in some environments.
Not at this level. Sure, smart companies do some R&D for moon shots but they generally do not invest such a large percentage of revenue into a new technology unless they are relatively sure of it paying off soon.