It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
This image was acquired from
Keywords from Image Description:
train station train railway rail transport station railroad move wagon metro speed transit subway motion urban fast locomotive track blue passenger line underground city path rapid tube crowd platform istanbul tunnel commute indoor way hall modern express engine empty
Page 2017 Free-images.com. All images are Public Domain