The highway is 2,559 miles long. It passes through California, Arizona, New Mexico, Texas, Oklahoma, Arkansas, Tennessee and North Carolina. Of that total, 455 miles of I-40 go through Tennessee.

This photo provided by Tennessee Department of Transportation shows Interstate 40 remains closed near the Tennessee-North Carolina state line due to flooding and rockslide on Wednesday, June 18, 2025.

I-40 closed in Tennessee on June 18 after a rockslide and flooding overtook the road. Good news, travelers! Interstate 40 is open once again at the Tennessee and North Carolina state line.

This photo provided by Tennessee Department of Transportation shows Interstate 40 remains closed near the Tennessee-North Carolina state line due to flooding and rockslide on Wednesday, June 18 ...

This photo provided by Tennessee Department of Transportation shows Interstate 40 remains closed near the Tennessee-North Carolina state line due to flooding and rockslide on Wednesday, June 18, 2025.