Source : WordNet®

superhighway
     n 1: a broad highway designed for high-speed traffic [syn: {expressway},
           {freeway}, {motorway}, {pike}, {state highway}, {throughway},
           {thruway}]
     2: an extensive electronic network (such as the internet) used
        for the rapid transfer of sound and video and graphics in
        digital form [syn: {information superhighway}]

Source : Free On-Line Dictionary of Computing

superhighway
     
        {information superhighway}