This article describes the challenges faced by the NYC subway system in a fascinating way: https://www.theatlantic.com/technology/archive/2015/11/why-dont-we-kn

This article describes the challenges faced by the NYC subway system in a fascinating way: https://www.theatlantic.com/technology/archive/2015/11/why-dont-we-know-where-all-the-trains-are/415152/ https://www.theatlantic.com/technology/archive/2015/11/why-d...