Drivers were stuck in long delays in town today (Friday).
Roadworks in Corporation Street at the junction with Asda resulted in delays around the area when the temporary lights broke.
It is believed the lights were stuck on red for around an hour and a half at the busy junction, which had a knock on effect around town.
A spokesman for Warwickshire County Council said: “There was a fault with the portable signal. It has since been fixed.
“We now have a traffic manager on site to make sure this does not happen again.”