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
East Chicago Gary
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.
EB U.S. Rt. 12/20; SB U.S. Rt. 41 at the Illinois/Indiana State Line. A set of junction markers on NB U.S. Rt. 41. EB U.S. Rt. 12/20 in Hammond. EB U.S. Rt. 20 near IN St Rt 912. A BGS on NB IN St Rt 912. EB U.S. Rt. 12/20 in Gary. A BGS on NB I-65. A BGS on EB I-90. EB U.S. Rt. 20 in Gary.