U.S. Federal Route 20 runs east-west across Lake County. It runs parellel to the Indiana East-West Toll Road and the Borman Expressway (I-80/94; U.S. Rt. 6). U.S. Rt. 20 passes through the following towns in Lake County. Hammond
U.S. Rt. 20 is multi-plexed in Lake County. U.S. Rt. 41, in Hammond.
U.S. Rt. 12 ,from the Illinois/Indiana State Line at Hammond to East Chicago.