Line 1 is Toronto Transit Commission's main north-south subway line, running under Yonge Street and University Avenue between Finch in the north and Vaughan Metropolitan Centre in the northwest. Direction announcements like this one help riders confirm they are boarding a train heading the right way, especially where the line loops through downtown. Short transit announcements have become popular online because they are instantly recognisable to local riders and easy to drop into travel videos, comedy sketches and city edits without needing any explanation.