Today’s invention is an attempt to lessen the burden of commuters who travel by tube/metro/underground train.
All such systems have escalators
Imagine if the escalators each have sensors to detect the static weight distribution of travellers (standing, as instructed on the right).
This pattern would be used to select a musical theme tune to be played on loudspeakers (for say one minute at a time).
Regular passengers might eventually be able to arrange themselves so as to choose the tune played.
