AMP: 450 Location: I-90 and 27th St, Billings Reassurance shield after MT-3 AMP: 450 Location: I-90 and 27th St, Billings 1.75 miles to I-90 Business/US-87 and the town of Lockwood. 5.5 miles to I-94. AMP: 451 Location: I-90 and US-87, Billings 1 mile to junction US 87 AMP: 452 Location: I-90 and US 87, Lockwood … Continue reading Interstate 90, MT-3 to I-90 Bus/US-87