Also, urban mass transportation systems have always interested me. Perhaps those are the reasons I found this photo irresistible and was thinking of an excuse to post it here:
This train is entering the New Lots Avenue station on the Canarsie Line (now the "L" train) of the New York City subway system. From the light and the condition of the trees, I'd guess it's from early spring. And, from the style of train cars, I can tell you that this undated photo was probably taken some time before the early 1970's, as these cars were "retired" by that time.
You can find this photo, and more, on www.nycsubway.org. (Note: The site is not affiliated with the Metropolitan Transportation Authority.)