AMP: 99 Location: US-30 and I-80, Sweetwater Cty Immediately after the 374 junction the route hits I-80. Exit right for I-80 West towards Evanston, and remain straight for 80/30 east towards Rock Springs. I-80 and US-30 will serve the same general corridor, running within about 15 miles of each other all the way to Grand … Continue reading U.S. Route 30, WYO 374 to I-80