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 Motors operated Yellow Coach as a subsidiary until 1943, at which time the company was merged with GMC Truck Division, and manufacturing shifted from Chicago to Pontiac, Michigan. A second "taxi war" broke out, with Checker Taxi Co and Terminal Taxi Co operators fighting it out in New York City. To end the dispute, New York Mayor Jimmy Walker created the New York Taxi Cab Commission (now called the New York City Taxi and Limousine Commission), which issued a limited number of cab operator permits, called taxi medallions, and mandated that cabs have seating for five passengers in the rear