Thanksgiving / holidays could be on the subway / metro
NYC could use legal "stop and frisk," better utilize police, and/or use weapon scanning technology in the subway
Railways could be suspended
Buildings / metros could have slides
Train platform barriers could prevent accidents, suicides, and/or crimes
Art / music / poetry could be found in public transportation systems
Inspirational messages / quotes could be left in highly trafficked areas
Trains could have hump-backed stations
Rail lines could become parks, hiking trails, art, or wildlife corridors
Subway / metro air quality could be improved
The NYC subway could be more accessible to the disabled
NYC subways should have platform doors