US-26 West (SW 6th Ave.) at I-405 North in Portland. Use I-405 North/US-26 West for the Zoo and Forestry Center. US-26 west joins I-405 northbound.
I-405 South - Exit 1C
I-405 South at Exit 1C - US-26 East/6th Ave./Ross Island Bridge. US-26 east leaves I-405 southbound. Approaching I-5 South/Salem and I-5 North/I-84 East/The Dalles/Seattle (WA).
I-405 North - Exits 1C and 1D
I-405 north at Exit 1C - 6th Ave. Approaching Exit 1D - US-26 West/Beaverton.