I believe this is a New York subway train, which I depicted while it was sitting still at a station somewhere in Queens. The sketch is dated March 15, 1987. I was in New York for one of my attempts to get work on book covers from science fiction publishers. In those days, you had to live in New York or at least travel easily there, in order to get work from publishers. Since I didn't live there, and found it difficult to get there quickly, I didn't get much work. It all seems quaint now, when illustrators from all around the world from the Philippines to Egypt to Argentina can get work and send the images to the publishers online.