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
Hybrid taxi March 2008. The city of Boston launched the CleanAir Cabs program in April 2007. The program promotes replacing older fuel-inefficient cabs with hybrid and alternative fuel vehicles as the existing fleet ages out. The main benefit of the CleanAir Cabs program for cab drivers is the operating savings, as hybrid taxi cabs can get up to three times as many miles per gallon of fuel as the old Crown Victoria cabs. In addition, hybrid taxi drivers get two "front of the line" passes per shift at Logan Airport, allowing them to make two extra trips daily. Hybrid taxi owners who