Overturned semi-trailer blocks lanes near Twin Trees Bridge

On Friday, May 2, at approximately 4:30 a.m., a 2013 International Pro Star truck tractor, pulling a set of double freight trailers, was traveling northbound on Hwy. 101, north of Twin Trees Bridge (m.p.m. 6) in Humboldt County.

Frank Martinoni, age 60, of Petaluma, was the driver of the semi-truck. For reasons still under investigation, the driver of the truck allowed the right side tires of the rear trailer to run off the east roadway edge of Hwy. 101 and into a drainage ditch. This resulted in the driver losing control of the trailer as it began to fishtail.

The rear trailer overturned onto its left side and came to rest in the #2 lane of northbound Hwy. 101. The truck tractor and the lead trailer did not overturn. The driver was uninjured as a result of the collision.

The collision caused hazardous materials that were in the trailer’s cargo to be released. At this time, the hazardous material product, and quantity spilled is undetermined. The scene remains under control and the hazardous material cleanup will be conducted by a licensed contractor provided by the trucking company.

In addition to CHP, Cal Fire, Garberville Volunteer Fire, Caltrans, and Humboldt County Environmental Health responded to the scene.

Both northbound lanes of Hwy. 101 were closed for an extended period of time during the recovery.

This collision remains under investigation by the California Highway Patrol. Alcohol does not appear to be a factor in the cause of this collision.


The trailer from a semi-truck lies on its side near Twin Trees Bridge south of Garberville on Friday.