But how do you get around one of these monster cities? You can't fly everywhere and the motorways operating at "unprecedented speeds" aren't always feasible.
So, what do you do? Walk? Hardly.
Cities would be equipped with sliding pavements that would whisk pedestrians along at up to sixty miles an hour. Since stepping on a mile-
Robert Heinlein featured slidewalks in his famous short story The Roads Must Roll in which he outlined a future in which traffic congestion in the mid 20th century became so bad that the motor cars were supplanted by systems of slidewalks spanning across entire regions like mechanised super highways.
And how were these slidewalks run? Why, by a corps of uniformed, gun-