sentences:  I-80 continues east across the Union Pacific Railroad to a full cloverleaf interchange with I-25 and US 87, where the highway enters the city of Cheyenne, the county seat and state capital.The Interstate crosses over a BNSF Railway line and has a diamond interchange with US 85 and the southern end of I-180, a non-freeway spur into downtown Cheyenne.East of I-180, I-80 receives the eastern end of its business route at its junction with WYO 212 (College Drive).