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
Cab Gallery collection. In 1999, Brown approached Stolper with the idea of exhibiting art in the spaces reserved for advertising in his traditional London Black Taxi, and Cab Gallery was launched in Hoxton Square on 24 September 1999. The first exterior was a text piece by Bob and Roberta Smith, "Taxy" in red and yellow vinyl. On the fold-up seats were two text pieces by Peter Liversidge, who became a regular contributor to the project and whose collected proposals were later published in book form. Also on display at the launch were "All the animals", an embroidered cushion by Abigail Cohen, "from