DC metro has always had carpet. I think they're getting rid of it these days. https://www.washingtonpost.com/local/trafficandcommuting/the-story-behind-the-carp

DC metro has always had carpet. I think they're getting rid of it these days. https://www.washingtonpost.com/local/trafficandcommuting/the-story-behind-the-carpeting-in-metros-railcars-it-stinks/2018/02/08/33d24974-0b92-11e8-95a5-c396801049ef_story.html https://www.washingtonpost.com/local/trafficandcommuting/the...