Synonyms for Superhighway (same or very similar meaning)
WordNet sense 1 (an extensive electronic network (such as the internet) used for the rapid transfer of sound and video and graphics in digital form):
information superhighwayWordNet sense 2 (a broad highway designed for high-speed traffic):
expressway, freeway, pike, throughway, thruway, motorway, state highwayFrom the ODE community, based on WordNetadd/edit