Traffic lights are an essential part of modern transportation systems, controlling traffic flow and ensuring safety on the roads. There are different names used to refer to them across the world depending on the region. In the United States, they are commonly known as stoplights, while in the United Kingdom, they are called traffic signals or simply lights. In Australia, they are known as traffic lamps, while in South Africa, they are called robots. Other synonyms for traffic lights include semaphore, traffic semaphores, signal lights, and red lights. Regardless of the name used, traffic lights are essential for regulating traffic flow and preventing accidents on the roadways.