Usando l’HTML5 e una copia della mappa della metropolitana di New York, l’ingegnere di Google Alexander Chen ha creato una specie di “strumento musicale” in cui le linee della metropolitana che si incrociano si pizzicano come accade alle corde della chitarra

“The piece follows some rules. Every minute, it checks for new trains launched from their end stations. The train then moves towards the end of the line, with its speed set by the schedule’s estimated trip duration. Some decisions were made for musical, aesthetic, and technical reasons, such as fading out routes over time, the gradual time acceleration, and limiting the number of concurrent trains. Also, I used the weekday schedule. Some of these limitations result in subtle variations, as different trains are chosen during each 24-hour loop.”