AMP: 133 Location: WYO 270 and US-18, Niobrara Cty The first signage for WYO 270 is to indicate that when flashing it might be closed. WYO 270 isn’t really 133 miles long, it just uses a strange milepost system (decreasing from here to US-18/US-20, and then jumping back up to 535 (!) and decreasing again). … Continue reading Wyoming Highway 270, US-18/US-85 to WYO 272