A semi hauling hazardous materials overturned early Wednesday morning on the northbound State Route 167 ramp to northbound Interstate 405, according to the Washington State Patrol.

There was no leakage of the material from the trailers, according to the patrol.  The drive, a 48-year-old Camas man,  wasn’t  injured.

Troopers said speed was a factor in the accident at 1:45 a.m.

The ramp was completely blocked for about 3 ½ hours. But northbound traffic this morning is heavy at the interchange.