superhighway

noun3

1. •
   (US) An expressway, especially one designed for high speeds.
2. •
   A major route that carries most of the traffic going in a given direction by a specified mode of transportation.

   • By 1400, however, Western Europeans had developed their own versions of oceangoing ships, and these transformed the much narrower Atlantic Ocean from a barrier into a superhighway. — 2015
3. •
   (figurative) The primary mechanism used in the movement of electronic data or information; information superhighway.

   • In the discussion about the pros and cons of the electronic superhighway, people often refer to the Internet. — 1996