The A66 Westbound will stay closed today as repair work was not finished on time.
The closure is between between Main Road near Bridgefoot and Stainburn Road near Workington.
A spokesman for Highways England said: "Following overnight roadworks which are taking longer to complete than anticipated.
"Our contractors are working as quickly as possible to complete the works and re-open the road. It is anticipated that the works will be completed by 8 o'clock tonight."
Road users are advised to follow the solid triangle diversion route:
Take the third exit at Chapel Brow roundabout for Great Clifton
At Stainburn roundabout take the third exit to Workington A66
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 The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.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