Location: I-90 and Deadwood Ave, Pennington Cty Reassurance shield after the SD-445 junction as we head out of Rapid City. A few miles later, we’ll approach unsigned SD-231, a fairly new state highway that covers the western half of the Rapid City business loop when the loop was decommissioned W to I-90 Bus, E to … Continue reading U.S. Route 14, SD-445 to SD-231