[Answer] What was the first city to have a traffic light?

Step 1 : Introduction to the question "What was the first city to have a traffic light?"

...1. Philadelphia 2. Paris 3. London 4. New York City

Step 2 : Answer to the question "What was the first city to have a traffic light?"

London - Introduced to ease congestion and protect pedestrians outside the Houses of Parliament in 1868 London, the world’s first traffic signal hardly resembles what drivers are used to today. For starters, it was operated by hand by a police officer — it took until 1914 for the first electric traffic light to be installed in Cleveland, Ohio. The first traffic light in London was a gas lamp with two red outstretched arms that rose when traffic should stop and fell when traffic was free to flow. Its initial success was short-lived, however. In January 1869, a leaky gas pipe filled the lamp’s tower and caused an explosion which injured the police officer who was operating it. The signal was taken down and wasn’t replaced for decades. London’s traffic problems continued to worsen, and in 1925, police-operated traffic signals returned, followed by the first automated light a year later.:

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