EVERETT — A semi truck overturned Thursday morning on a ramp to I-5 around Everett Avenue, spilling particles into the road and causing a 4½-hour closure. Point out Section of Transportation targeted visitors cameras showed the semi’s trailer more than the edge of the ramp from westbound U.S. 2, following the rollover crash around 10:50 a.m. The crash blocked traffic heading north on to I-5. The truck’s load — what appeared to be garbage — spilled on to a brushy hill and Everett Avenue under. The arterial road by means of the town was closed for about a few blocks, according to Everett police. Two state troopers stand in close…