 During training, would-be cabbies, known as "Knowledge boys" or "Knowledge girls", usually follow these routes around London on a motor scooter, and can be identified by the clipboard fixed to the handlebars and showing details of the streets to be learned that day.Taxi-driver applicants must be 'of good character', meeting strict requirements regarding any criminal record, then first pass a written test which qualifies them to make an "appearance".At appearances, Knowledge boys and girls must, without looking at a map, identify the two points of interest in metropolitan London that their examiner chooses and then choose the shortest and most sensible route from one to the other.