4:26 update:

The right lane of southbound 167 is open. Traffic backup is around 6 miles.

Original post:

Around 2:30 p.m. today, a semi-truck lost control on southbound SR 167 and spilled onto its side, blocking all lanes of traffic.

The driver was extracted and transported to a local hospital with serious injuries.

At last reports, the backup was more than five miles long and traffic was being re-routed onto southbound SR 410.

There is no estimate for when lanes will reopen.