AMP: 8 Location: Waterloo Rd and MT-55, Jefferson Cty No reassurance shield as 422 begins. 422 drops down into the Jefferson River floodplain and just kind of parallels 55 and 41. Not sure if it’s an old alignment. AMP: 5 Location: Waterloo Rd and Riverside Dr, Madison Cty It is paved for a little bit, … Continue reading Montana Secondary Highway 422, MT-55 to MT-41