Izikhungo ku Portland vula Southwest Canyon Road ube nesilinganiso esimaphakathi — 4.1 (ngokwezilinganiso zomsebenzisi Mapich).
Southwest Canyon Road, Portland ezitholakele — iretshurenti, izu yezilwane futhi ezinye izikhungo.
Le datha ikhiqizwa kusetshenziswa izihlungi zangokwezifiso ezisuselwe kukho 8 Izinkampani, eyethulwe kuleli khasi.