APM: 19 Location: SR 271 and US 101, Mendocino Cty Reassurance shield! after the US 101 junction. APM: 22 Location: US 101 and CR 4420, Mendocino Cty A couple miles later, we’ll cross into Humboldt County. APM: HU/0 Location: SR 271 and US 101, Humboldt Cty Less than a mile later, we’ll approach US 101 at grade. Turn … Continue reading California State Route 271, US-101 to US-101