Origin: Latin prefix super-
Superhighway has 3 different meanings across 1 category:
a broad highway designed for high-speed traffic
an extensive electronic network (such as the internet) used for the rapid transfer of sound and video and graphics in digital form
An expressway, especially one designed for high speeds.
The word superhighway comes from combining the prefix super- with highway. It originally meant a road that is higher or above an ordinary highway.