AMP: 60 Location: I-90 and Markwell Ave, Shoshone Cty As the Silverton exit merges back on, we’re one mile from the Wallace loop AMP: 61 Location: I-90 and Markwell Ave, Shoshone Cty Reassurance shield after the Silverton spur AMP: 61 Location: I-90 and Front St, Wallace Exit for the I-90 Wallace loop. This segment of I-90 was the … Continue reading Interstate 90, I-90 Bus Spur to I-90 Bus