What term describes the learning process undertaken by potential London taxi-cab drivers?

Taxicabs are regulated throughout the United Kingdom, but the regulation of taxicabs in London is especially rigorous with regard to mechanical integrity and driver knowledge. The London taxicab driver is required to be able to decide routes immediately in response to a passenger's request or traffic conditions, rather than stopping to look at a map, relying on satellite navigation or asking a controller by radio. Consequently, the "Knowledge of London" is the in-depth study of a number of pre-set London street routes and all places of interest that taxicab drivers in that city must complete to obtain a licence to operate a black cab. It was initiated in 1865, and has changed little since.