AMP: Corvallis-Newport Hwy #33/55 Location: US-20 and Pacific Hwy W, Corvallis Reassurance shield as 20 joins 34. AMP: 54 Location: US-20 and Western Blvd, Corvallis Reassurance shield as the road comes back down to two lanes and we head out of Corvallis. AMP: 52 Location: US-20 and 77th St, Philomath Less than two miles later, we’ll enter Philomath. … Continue reading Oregon Route 34, US-20/OR 99W to US-20