Traffic control is a job that involves managing the flow of traffic in a given area. One of the most common tools used for traffic control is the stoplight, which is a nine-letter word. Stoplights are used to regulate the flow of traffic by signaling when vehicles should stop, go, or proceed with caution. They are also used to indicate when pedestrians can cross the street. Stoplights are an important part of traffic control, as they help to ensure the safety of drivers, pedestrians, and other road users.