Location: US-16A and SD 87, Custer Cty Reassurance shield after 87 joins. The two routes will just concur for a couple miles Location: US-16A and SD 87, Custer Cty Another reassurance shield after we get away from the junction Location: US-16A and SD 87, Custer Cty A couple miles later, 87 will split to head … Continue reading U.S. Route 16 Alternate, SD-87 to SD-87