 U.S. 12 and U.S. 20 do not cross at this point — they parallel each other for another 22 miles (35 km) westbound and overlap in Gary; U.S. 20 is generally considered the faster of the two, while U.S. 12 is the scenic Dunes Highway.Eastbound, U.S. 12 travels through Michigan City and northeast into Michigan where it forks east from the Red Arrow Highway.U.S.