District of Columbia officials cut power to traffic signals in Dupont Circle for about six hours Tuesday for crews to perform upgrades.
D.C. Department of Transportation officials said the lights went dark about 10 a.m. For several hours, the District posted traffic control agents at corners of each intersection to direct traffic while the lights were out.
News4's Tom Sherwood said although traffic did get heavy about 12:30 p.m., control officers were doing a good job of keeping the flow moving.
DDOT said that battery systems were installed so that the traffic lights can function in the event of a power outage. However, in order to make the change, the lights had to be temporarily shut down.