AMP: Salmon River Hwy #39/27 Location: OR 18 and OR 22, Polk Cty Reassurance shield after the OR 22 split. AMP: 30 Location: OR 18 and Harmony Rd, Yamhill Cty Reassurance shield a mile and a half later as we cross into Yamhill County. AMP: 33 Location: OR 18 and Loganberry Ln, Yamhill Cty Reassurance shield a couple … Continue reading Oregon Route 18, OR 22/OR 18 Bus to OR 18 Bus