Self-driving cars going at 200-300mph for long periods of time seems unlikely. At that point you might as well build lanes for maglev trains. Also, the hyperlo

Self-driving cars going at 200-300mph for long periods of time seems unlikely. At that point you might as well build lanes for maglev trains. Also, the hyperloop technology could at the very least be useful for transporting stuff across the ocean (and hopefully cheaper than it is to do it by plane).