AMP: 0 Location: WYO 173 and US-20, Hot Springs Cty Reassurance shield at the beginning of the route, a quick road that serves mainly to provide state maintenance to a small bridge AMP: 1 Location: WYO 173 and Hot Springs CR 31 WYO 173 ends, Hot Springs CR 31/Yellowstone Rd begins a mile after 173 … Continue reading Wyoming Highway 173, US-20/WYO 789 to Hot Springs CR 31