Bayan barin St. George, I-15 ya ci gaba da arewa maso gabas kuma ya wuce ta arewacin birnin Washington.
Tabbas, wani nau'i mai rikitarwa na jumla shine "Bayan barin St. George, I - 15 ya ci gaba da arewa maso gabas kuma ya wuce ta arewacin birnin Washington, tare da haɗuwa a Green Springs Drive, Washington Parkway, da kuma Jihar Street (SR - 9 )".