A blown tire caused a cement truck to roll over Monday, snarling traffic about 15 miles north of Dayton on Highway 12.

The Washington State Patrol reported Nathan L. Griffith, 47, of Walla Walla, was driving a 2006 Kenworth cement truck westbound on Highway 12 when the left front tire blew out at 9:40 a.m.

The truck rolled over and ended up in the ditch of the eastbound lane.

The roadway was blocked intermittently throughout the afternoon. Griffith was uninjured. The truck was totaled, the patrol reported.