State Route 16 in Franklin County will continue to be closed near log mile 17.7 for two added weeks as cleanup continues from a rockslide that took place March 25.
Initial plans called for reopening the highway by Friday, but a news release from the Tennessee Department of Transportation said "unforeseen events" have delayed that opening.
The release said TDOT contract crews are now working on several unstable areas on the slopes.
The additional repair work is expected to be completed by April 26.
During the interim, only local passenger car traffic is being allowed to use Iron Gap Road as a detour, the release said.