How many streets do London taxi drivers have to memorize?
And a cab driver in London is required to know the quickest way off by heart. That is because they know the center of the British capital; they'll have committed 320 runs across 25,000 streets, encompassing at least 20,000 landmarks, to memory.
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It turns out that to become a Black Cab driver in London applicants need to study for two to four years and during that time memorize an incredible 25,000 streets and 20,000 landmarks within a 25-mile radius of Charing Cross in London.
For all that, you can thank the Knowledge, a 153-year-old system for memorizing every street and landmark in a six square-mile area of central London. The Knowledge requires all cabbies to navigate between any two points in the city entirely from memory.
How do taxi drivers learn the streets in their area? Many of them grew up in the area or have lived there for awhile so they know the streets simply from being a part of the community. Others, who have to learn on the job, simply pick it up from the many hours of driving the streets each week!
The Knowledge of London test is renowned around the world for being one of, if not the, hardest taxi knowledge test in existence. Often referred to as simply, 'The Knowledge' aspiring London cabbies can expect to spend around 3-4 years of study before being able to pass the test.
And a cab driver in London is required to know the quickest way off by heart. That is because they know the center of the British capital; they'll have committed 320 runs across 25,000 streets, encompassing at least 20,000 landmarks, to memory.
Previous studies have shown that taxi drivers have a larger hippocampus compared to non-taxi drivers. This is interesting as this brain region shrinks and becomes damaged in Alzheimer's disease, leading to symptoms of memory loss and confusion associated with the disease.
In other words, taxi drivers had plumper memory centers than their peers. It seemed that the longer someone had been driving a taxi, the larger his hippocampus, as though the brain expanded to accommodate the cognitive demands of navigating London's streets.
In order to become a licensed London taxi driver, you must pass the difficult and gruelling Knowledge test, of which there is a 70% drop out rate and for which there are no study materials. In order to apply for the Knowledge, you must be: At least 18 years old (you cannot receive your license until you are 21)
It turns out that to become a Black Cab driver in London applicants need to study for two to four years and during that time memorize an incredible 25,000 streets and 20,000 landmarks within a 25-mile radius of Charing Cross in London.
Taxi drivers, as well as other professional drivers categories, may experience genitourinary disturbances such as voiding dysfunction, urinary infections but also infertility, urolithiasis, bladder cancer, also called “taxi cab syndrome”[13].
How do black cab drivers navigate London's streets without relying on GPS? Rather than a one-off exam, The Knowledge is a series of tests called appearances where you are grilled on your ability to navigate the streets from memory.
But for the most part, a cab company owns the vehicle. They lease it to their drivers who in turn get to keep 100% of the fares and tips (some companies charge less for the lease, but retain a portion of the fares).