The flyover at Festival Park in Stoke-on-Trent is to remain closed for the time being.
It has been shut since teatime on Tuesday evening due to a problem with one of the expansion joints which run across both lanes.
A city council spokesman said: “We thank motorists for their patience and understanding while the flyover is closed.
"It’s been necessary for us to bring in specialists who are carrying out detailed investigations on site with us now.
"Once these have finished, we will have a clearer idea on potential repairs and timescales for reopening the flyover. In the meantime, we have taken this opportunity to repair manholes, fill potholes and clear gullies on the flyover, something which we normally have to close it for a few hours to carry out.
“We appreciate this is a busy route and its closure will cause congestion for motorists, particularly in rush hour, but the safety of the public has to be our number one priority. Traffic is being diverted through the roundabout underneath the bridge and we are looking at the timing of traffic lights.
"The closure has also been added to the roadworks.org website and should now show on people’s satellite navigation systems. We would encourage motorists to allow more time for their journeys or find an alternative route.”