In Cleveland, Ohio, the first electric traffic light is installed.

Cleveland is a city in the U.S. state of Ohio and the county seat of Cuyahoga County. Located along the southern shore of Lake Erie, it is situated across the Canada–U.S. maritime border and approximately 60 mi (97 km) west of the Ohio–Pennsylvania state border. Cleveland is the most populous city on Lake Erie and second-most populous city in Ohio with a population of 372,624 at the 2020 census, while the Cleveland metropolitan area with an estimated 2.17 million residents is the 34th-largest metropolitan area in the United States.

Traffic lights, traffic signals, or stoplights – also known as robots in South Africa, Zambia, and Namibia – are signaling devices positioned at road intersections, pedestrian crossings, and other locations in order to control the flow of traffic.