Pneumatic tube roadways will appear

Gregory Benford : science fiction author and astrophysicist
A Honeywell engineer predicts that by A.D. 2000 roads and streets will be replaced by a network of pneumatic tubes. Family vehicles will need only a small amount of mobile power, since they will only have to get from the owner’s home to a nearby tube. Then they will be pneumatically powered to any desired destination. Pneumatic pockets will completely eliminate the possibility of crashes
Some day, you may even have the option of driving vehicles that require no highways. Ground-effect machines—or Hovercars—which ride on a friction-free cushion of air created by the downblast of powerful air jets, can go anywhere, even over water, as long as their air cushion is sustained.

GREGORY BENFORD, Popular Mechanics, (2012), "The Future That Never Was: Pictures from the Past', [online], Available: