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 swap, and merged it with Markin Automobile Body, forming Checker Cab Manufacturing in order to honor the contractual commitment. Checker cabs were manufactured in Joliet for two years, then production was shifted to Kalamazoo, Michigan. The sturdy Checker cabs gained the acceptance and loyal following of Checker Taxi operators in Chicago. Markin began buying up Checker Taxi operators' licenses in 1924, gaining full control of the company in 1937. Markin followed Hertz's business plan in having drivers open doors for the fares, and outfitted each driver with a uniform. Checker became the first cab company to hire African-American drivers and