AMP: 0
Location: US-18 and US-85, Niobrara Cty
Reassurance shield as US-18 splits from US-85. This is the first time in its existence that US-18 will run completely alone
AMP: 10
Location: US-18 at the South Dakota State Line, Niobrara Cty
A few miles later, US-18 will enter South Dakota and continue its journey eastward to Wisconsin
