A water main break under I-40 west in Kingston has traffic backed up for miles.

The main break happened at mile 352, according to TDOT. Road crews said one lane is currently closed and it's causing significant delays.

TRAFFIC MAP: Click here for a real-time traffic map

Right now, TDOT doesn't expect the road to be cleared until 5 p.m. Friday.

10News will update this story with more information as it becomes available.