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.

A section of Interstate 40 reopened this year in the Pigeon River Gorge. Now a rockslide nearby means the highway is impassible again.

Interstate 40 in western North Carolina, the 20 miles in both directions nearest the Tennessee border, has reopened following a closure this month from flooding and a rockslide. In social media posts by the respective Transportation Departments of both states,