APM: 51 Location: US 101 and Main St, Humboldt Cty Reassurance shield as the business loop rejoins. APM: 47 Location: US 101 and Stafford Rd, Humboldt Cty Reassurance shield after Stafford Rd. APM: 47 Location: US 101 and Stafford Rd, Humboldt Cty After we head out of Rio Dell, we’ll approach the Avenue of the Giants, which is … Continue reading U.S. Route 101, US-101 Bus/SR 283 to SR 254