Normally lights favor heavy traffic patterns during rush hour, allowing longer green lights for inbound drivers, but that was not the case Tuesday morning, when a leaky air conditioner apparently caused a power outage that caused problems with the computer that controls the lights.
The signals returned to normal by 10 a.m., but some major corridors in the county still had back-ups -- thanks, in part, to a crash on Interstate 95 -- including Route 29 and Georgia Avenue. Some commuters said they were still trying to make it into work at that time.
There was a similar problem for a couple of days in November 2009. The signals being out of sync caused major back-ups for morning and evening commuters. Some intersections were manually controlled to help with the flow of traffic.