superhighway

noun superhighways

1. US An expressway, especially one designed for high speeds.
2. broadly A major route that carries most of the traffic going in a given direction by a specified mode of transportation. We cannot and should not be rebuilding old "two lane" sections of the air transport system with segments having "eight lane superhighway" capacity without knowing the full economic, safety, and environmental impacts of the entire air traffic superhighway.
3. figuratively 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.