AMP: Willamina-Sheridan Hwy #157/0 Location: OR 18 Business and OR 18, Polk Cty No reassurance shield as 18 Business begins. AMP: 1 Location: OR 18 Business and Hill Dr, Willamina A mile later, we’ll enter Willamina. AMP: 3 Location: OR 18 Business and Oaken Hills Dr, Yamhill Cty Reassurance shield as we head out of Willamina. AMP: 5 Location: … Continue reading Oregon Route 18 Business, OR 18/OR 22 to OR 18