Izikhungo ku Billings vula Zimmerman Trail Road ube nesilinganiso esimaphakathi — 4.6 (ngokwezilinganiso zomsebenzisi Mapich).
Zimmerman Trail Road, Billings ezitholakele — ezinye izikhungo.
Le datha ikhiqizwa kusetshenziswa izihlungi zangokwezifiso ezisuselwe kukho 2 Izinkampani, eyethulwe kuleli khasi.