London, United Kingdom
As any visitor can tell you, black cabs are common sites around London and, unlike in some destinations (we’re looking at you, New York City), it’s easy to tell whether or not a cab is available. From personal experience, it’s simply a question of seeing through the fog and rain to see the word ‘TAXI’ lit up. That means the cab is available for use—when the light is off, it’s not available. Black cabs are required to be wheelchair accessible, according to Visit London, which makes it easier for everyone to get around the city. Additionally, London taxi drivers have to pass an extensive London geography test called The Knowledge to earn their licenses, so they usually know every alley, street, and landmark.
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Mexico City, Mexico
Take Uber or to have your hotel call for a radio-dispatched sitio taxi or set you up with a turismo taxi, who will typically pick you up, wait for you, and return you to your hotel. If you do take a cab, don’t hail one off the street, but grab one at a taxi stand. Once in the cab, pay attention to where the driver is going, make sure there’s a meter, and carry small bills. According to a T+L expert, another option is hiring a private car or take the Metro in Mexico City. For the latest safety information, go to travel.state.gov.