A semi blocked Highway 12 for about two hours about 15 miles west of Harlowton on Monday night, according to a notification from the Montana Department of Transportation.
The road was reopened at about 10 p.m.
The road was totally blocked by the semi for an unknown reason at about 8 p.m. at mile marker 84.
MDT also had an alert for Highway 12 a few miles east of the blockage for about two inches of water over the road for a roughly 50-foot stretch. That alert was also rescinded late Monday.