Oh how I loved the Black Cabs of London! If only the US had a similar system!

Also known as the London Black Cab, these vehicles, and their drivers, have earned the reputation for providing the best taxi service in the world.
Every driver is required to undergo a rigorous test of his/her knowledge of London which can take up to four years to learn before the coveted badge is awarded.
Each individual's character is tested and checks are made regarding any criminal records.