Drivers were warned to take extra care after Traffic lights failed around Frideswide Square, Oxford.
Several sets of lights failed between Hythe Bridge Street and Becket Street and engineers are working to fix them.
Traffic is reportedly coping well.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here