From the NCDOT:
The N.C. Department of Transportation
The tunnels being examined are located between the Tennessee border and Exit 15 (Fines Creek). Two of the tunnels are on the eastbound side of the interstate and one is on the westbound side.
All work will take place between 8 p.m. and 6 a.m. During work on the first I-40 East tunnel, the entire tunnel will be shut down and traffic will be routed along an adjacent service road. Work on the other two tunnels will be conducted by shutting down one lane of traffic.
The tunnels on I-40 East will be examined on the following dates:
First tunnel: Sunday, July 22-Wednesday, July 25, and Sunday, July 29
Second tunnel: Sunday, July 29-Wednesday, Aug. 1, and Sunday, Aug. 5-Monday, Aug. 6
The tunnel on I-40 West will be examined on the following dates:
Tuesday, Aug. 7-Wednesday, Aug. 8, and Sunday, Aug. 12-Wednesday, Aug. 15
The investigation work is being conducted by HDR Engineering Inc. of the Carolinas, with traffic control assistance provided by NCDOT and IMAP.
NCDOT reminds motorists to watch signs for construction information, stay alert and obey the posted speed limit.