This isn't just a construction phenomenon. The NYC MTA uses trains for collecting garbage and, until recently, money. https://www.nydailynews.com/new-york/mta-

This isn't just a construction phenomenon. The NYC MTA uses trains for collecting garbage and, until recently, money. https://www.nydailynews.com/new-york/mta-refuse-rigs-collect-90-tons-garbage-day-article-1.124042 https://www.nydailynews.com/new-york/mta-refuse-rigs-collect... https://en.wikipedia.org/wiki/Money_train https://en.wikipedia.org/wiki/Money_train