TSA shutdown screening passengers in June of 2015 since there was no place for screened passengers to go and the lack of amenities after screening until you arrive at a terminal. I have been to or through Denver more than once when the train system was out of service. Once I was in the departing concourse after waiting 30 minutes, I noticed a kid urinating in the tree pot.

Any delay with the train system is serious since that is only method of transport between some terminals. Because of my past encounters with the train system, I actively avoid the airport as much as possible.

Denver is the only airport I have traveled through with frequent trains out of service and delays.