1) Any very fast route or course 2) Expressway 3) Freeway 4) Highway 5) Information 6) Main road 7) Modern means of travel 8) Motorway 9) Pike 10) State highway 11) Throughway 12) Thruway Found on https://www.crosswordclues.com/clue/superhighway
noun an extensive electronic network (such as the internet) used for the rapid transfer of sound and video and graphics in digital form Found on https://www.encyclo.co.uk/local/20974
a highway designed for travel at high speeds, having more than one lane for each direction of traffic, a safety strip dividing the two directions, and cloverleaves to route the traffic on and off the highway. Cf. · any very fast route or course. Found on https://www.infoplease.com/dictionary/superhighway