 The Lehigh Valley Thruway is a freeway portion of US 22 from the eastern end of the Interstate 78/US 22 concurrency in Kuhnsville, west of Allentown, to the state line in Easton.The highway travels just to the north of Allentown and Bethlehem and passes through Easton.Originally, I-78 would have continued with the U.S. 22 concurrency on the Lehigh Valley Thruway into New Jersey, and I-178 and I-378 serving Allentown and Bethlehem respectively.