High speed rail should be the first to go. Robotic, electric cars (coming in the very short term) allow for point to point travel at equal speeds. The efficie

High speed rail should be the first to go. Robotic, electric cars (coming in the very short term) allow for point to point travel at equal speeds. The efficiency may be somewhat lower by mass, but not to any extent that people will care. At least air travel is much faster than cars or rail. This makes for a funny* situation regarding things like CA high speed rail plan for SF to LA which is currently slated for completion in 2028. If this turns out to be 10 years after the first commercial robotic car, it will likely be obsolete prior to its first run. *Depends on your sense of humor.