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
Taxi Media offer free taxi rides as a way of promoting taxi advertising in London. A famous case of this was in 2006 when Taxi Media offered free cab rides for 10 weeks. Taxi Media made headlines in the outdoor advertising arena when they announced they would be offering two week advertising campaigns. This was the first of its kind in the UK. From the start of a campaign through to completion, Taxi Media advise on what will work well on a taxi format. This includes concept art mock-ups, artwork creation, print relationships, special build sourcing, quality assurance, campaign photography and videography.