Thats what I meant too, the single one shot GT is the only one in the tube between 21st and Lex-63rd in either direction, so it seems a bit out of place.
On another note, the DGTs at Roosevelt Ave seem to have been looked at. Got on a s/b via the local (unplanned reroute) this morning. Speed was not much slower than normal into Roosevelt Ave, so I was a bit surprised when the crossed over to the express track. Ever since the resignalling a couple of years ago the DGTs they put in would force trains to crawl thru the station up to the homeball, but not today.