Solutions D.C.'s subway system has 7 entries with similar clues

• 3-letter words
• ratPopular sighting on the NYC subway, perhaps
• busSubway alternative
• 4-letter words
• appssnapchat and subway surfers
• uberEschew the subway, say
• codeSystem of segregation formerly practiced by System of signals
• 5-letter words
• cabitEschew the subway, say
• 9-letter words
• footlongsSubway fare