Like helical escalators, moving walkways have been on engineers imagination and drawing
boards for many years.
One significant moving walkway was built by engineer Max Schmidt at the “Exposition Universal” Paris 1900. Following early versions at the Chicago world fair and in Berlin, he constructed a 3km long winding walkway for the benefit of fair visitors. The machine included three series of articulated platforms moving at different speeds. The first platform was stationary, allowing commuters to board the second moving platform at a speed of 4km/h, and then to the third platform with top speed of 8km/h.
The machine carried approximately 7 million passengers during its period of operation and was considered a great success of the Parisian fair.