AMP: Pacific Hwy #1/123 Location: I-5 and Portland Ave, Douglas Cty Shortly after the Oregon 99 exit, we’ll approach the Oregon 138 junction as we head around the west side of Roseburg. AMP: 124 Location: I-5 and Harvard Ave, Roseburg Exit for OR 138. OR 138 west will join I-5 north.  N to OR 99, S to … Continue reading Interstate 5, OR 99 to OR 138