Hackney carriage which a taxi may operate and include regulating the taximeter (not compulsory until 1907), the maximum age of the taxi (not more than 15 years), advertisements and the turning circle of . As part of the Transported by Design programme of activities, in 15 October 2015, after two months of public voting, the black cab was elected by Londoners as their favourite transport design icon. In London, hackney-carriage drivers have to pass a test called The Knowledge to demonstrate that they have an intimate knowledge of the geography of London streets, important buildings, etc. Learning The Knowledge allows the driver
Checker Taxi had terminals, there was considerable need for on-demand, point-to-point chauffeur-driven transportation. Hotels, department stores, and office buildings embraced the amenity, but often limited access to their facilities to a single cab company. Kickbacks were common, and the system favored larger operators, who had the financial resources to "play the game". By 1920, there were two dominant taxicab companies operating in Chicago: Yellow Cab and Checker Taxi. Yellow Cab Company was founded in 1910 by John Hertz who subsequently established his own cab manufacturing business in 1917. Checker Taxi did not own its own cab manufacturing company, but principally used Mogul