In anticipation of the 1967 opening of the Chrystie Street Connection, which combined two major BMT and IND services as single routes and resulted in numerous other changes (especially on the "14" and "15"), the TA decided to adopt universal systems of signage and nomenclature. The rationale was that this would make the system more consistent and more understandable for newcomers to the city and tourists, who were presumed to be uninterested in or even confused by historic or community names, or might not be native English speakers.