SHENANDOAH COUNTY, Va. (ROCKTOWN NOW) – Virginia State Police continue to investigate Sunday morning’s crash on Interstate 81 in Shenandoah County that snarled traffic for several hours.

Sergeant Brent Coffey said in a news release that the mishap occurred shortly after 4 a.m. Sunday morning when a tractor-trailer was traveling north on I-81. The vehicle ran off the left side of the highway north of the Toms Brook exit before colliding with a guardrail and overturning.

The driver – Shawn Alford, 59, of Grottoes – was not injured. However, more than 100 cattle were being transported in the trailer at the time of the crash.