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The Roads Must Roll is a 1940 science fiction short story by Robert A. Heinlein about wide, rapidly moving passenger platforms (like the mechanical walkways in some real-life airports but much faster). These roads combine the features of highways and highway towns, and all goes smoothly until there's union trouble. The men who maintain the roads get around beneath them via motorized, gyroscopically stabilized unicycles like the real-life Segway.
Heinlein's theme is technological change and social coheson. The (fictional) social movement he calls functionalism (which is unrelated to the real-life sociological theory of the same name) believes that one's status and level of material reward in a society must and should depend on the functions one performs for that society.
In "The Roads Must Roll", the technicians who maintain the San Diego to Reno roadway are duped into believing that their role in maintaining the nation's transport infrastructure is more important than that of any other workers and that they should therefore be rewarded more highly than any others. To demonstrate their importance and press their claims, they stop the central 100 mph strip, causing transportation chaos and many casualties.
Larry Gaines, Chief Engineer of the roadtown, is instrumental in restoring order and bringing the villans to justice, through a combination of clear thinking, swift para-military action at the head of his uniformed cadets, and appeals to patriotism.
