It’s a new era! Ain’t no big rig too big! Caltrans explains: 


Caltrans is pleased to announce that Route 299 is now free of STAA restrictions from the U.S. Highway 101 junction in Humboldt County all the way to Interstate 5 in Redding. This change in designation comes shortly after Caltrans District 2 completed improvements at Buckhorn Grade in Shasta County.

The 1982 Surface Transportation Assistance Act (STAA) set the bar for trucks sized to industry standards. As STAA trucks have become the national standard, communities with major routes unable to provide STAA access have been at an economic disadvantage.

“The opening of Route 299 to STAA standards provides another link for industry standard-sized trucks to reach the North Coast from the rest of California and beyond,” said Caltrans District 1 Director Matt Brady. “U.S. Highway 101 from just north of Richardson Grove in Humboldt County to the Oregon border is already accessible by STAA industry standard-sized trucks.”

The scenic east-west route has been the site of multiple projects in recent years to prevent truck off-tracking by realigning tight curves.