Interstate 40 is open once again at the Tennessee and North Carolina state line. The highway reopened June 27 following a rockslide and flood that overtook the road June 18. Drivers can now cross the state's border on I-40. For those planning to take the interstate through the mountains, here's what you should know before you drive.

I-40 reopened on June 27 after a spokesman with the Tennessee Department of Transportation said the road would open on or before Thursday, July 3, after the flash flooding last week. “Please use extreme caution as workers are still present,