The company's slogan is "Bringing light to the world", a reference to the Titan Prometheus who stole fire for mankind. Promethian cabs are bubble-shaped electric taxis painted yellow with a black-and-white checked stripe down the side in the manner of old Checker Cabs. There is a printed price of 25 cents on the side. Whether this is the minimum fare, or the rate per mile or kilometre is never stated.
The name is doubly significant. Firstly, it is from a classical myth and thus may suggest a link to Veidt Enterprises and/or Pyramid Deliveries, as Adrian Veidt is very fond of mythological and Heroic imagery. Secondly, The Modern Prometheus is the subtitle of Mary Shelley's Frankenstein, the story of an idealistic young genius who creates a monster.