AMP: 0
Location: Howie Rd and US-191, Sweet Grass Cty
No reassurance shield as S-478 begins.
AMP: 2
Location: Howie Rd and Rapelje Rd, Sweet Grass Cty
Two miles into the route, turn left to stay on S-478/Rapelje Rd. Pavement ends at the turn.
AMP: 2
Location: Rapelje Rd and Howie Rd, Sweet Grass Cty
No reassurance shield after the turn.
AMP: 22
Location: Rapelje Rd and Stephens Hill Rd, Sweet Grass Cty
20 miles later, we’ll approach Stephens Hill Rd and S-478 ends. The road continues to Rapelje.
