Good morning on this cheery-chilly Monday.

Commuters have been bemoaning the city’s crumbling subway system for decades — specifically the increase in delays and crowded trains.

(Yes, we feel you 7 train riders.)

Having more passengers but fewer trains is senseless logic. So what, and who, is to blame? And how did we get here?

An investigation by The New York Times revealed that as our subway system has aged — with signal problems and car equipment failures happening twice as frequently as a decade ago — city and state lawmakers have steered money away from fixing the issues. And that lack of investment has caught up.

A few numbers that highlight the situation:

5.7 million

The daily ridership, which has doubled in the past two decades.

More than 111,000

The number of delays because of “overcrowding” in the first four months of 2017, which was 37 percent of all delays.