sousveillance n.— «You get into a taxi cab, you’re under surveillance. There’s a camera taking pictures of you. If you were to photograph the cab driver, that would be what I call sousveillance. If you walked into a department store and...
tap-tap n. a truck or van used as an independently operated taxi. (source: Double-Tongued Dictionary)
hack-up n.— «Mr. Salazar had to visit…the Taxi and Limousine Commission center in Woodside, Queens, for his rate card, used car inspection and “hack-up,” the actual affixing of his new medallion to the hood of his car...