AMP: 13 Location: I-15 and 50 N, Oneida Cty Reassurance shield after the SH-38 interchange. AMP: 2 Location: I-15 and Woodruff Rd, Oneida Cty Reassurance shield after Woodruff Rd, the last Idaho interchange. AMP: 0 Location: I-15 at the Utah Line, Oneida Cty Welcome to Utah! I-15 is Utah’s backbone, heading down to Salt Lake (as shown on … Continue reading Interstate 15, SH-38 to UT State Line