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
Whiting
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. EB U.S. Rt. 12/20; SB U.S. Rt. 41 at the Illinois/Indiana State Line. (August, 2018) EB U.S. Rt. 12/20; SB U.S. Rt. 41 at the Illinois/Indiana State Line. (March, 2024) A BGS on WB I-90/IN E-W Toll Rd. A BGS on WB I-90/IN E-W Toll Rd. A set of junction markers on NB U.S. Rt. 41. A junction marker on NB U.S. Rt. 41. A guide marker on NB U.S. Rt. 41. EB U.S. Rt. 12/20 east of U.S. Rt. 41. EB U.S. Rt. 12/20 in Hammond. EB U.S. Rt. 12/20 in Whiting. WB U.S. Rt. 12/20 at Cline Ave. EB U.S. Rt. 12/20 at the Lake George Canal. WB U.S. Rt. 12/20 at McShane. WB U.S. Rt. 20 south of U.S. Rt. 12. WB U.S. Rt. 20 at 145th. WB U.S. Rt. 20 north of IN St Rt 312. A junction marker on EB IN St Rt 312. EB U.S. Rt. 20 south of IN St Rt 312. WB U.S. Rt. 20 south of IN St Rt 312. WB U.S. Rt. 20 north of IN St Rt 152. A guide marker on WB U.S. Rt. 20. EB U.S. Rt. 20 near IN St Rt 912. A BGS on NB IN St Rt 912. A BGS on NB IN St Rt 912. A BGS on NB IN St Rt 912. A BGS on NB IN St Rt 912. A BGS on NB IN St Rt 912. WB U.S Rt. 12/20 at IN St Rt 912. EB U.S. Rt. 12/20 east of IN St Rt 912. EB U.S. Rt. 20 west of Colfax in Gary. EB U.S. Rt. 20 near Burr in Gary. EB U.S. Rt. 12/20 near Wabash in Gary. EB U.S. Rt. 12/20 near Taft in Gary. EB U.S. Rt. 12/20 near Garfield in Gary. A junction marker on SB IN St Rt 53. EB U.S. Rt. 12/20 in Gary. A BGS on NB I-65. A BGS on NB I-65. A set of guide markers on NB I-65. A BGS on EB I-90. A BGS on EB I-90/IN E-W Toll. EB U.S. Rt. 12/20 east of I-65. EB U.S. Rt. 12/20 near Miller. EB U.S. Rt. 12/20 at east U.S. Rt. 12. EB U.S. Rt. 20 east of U.S. Rt. 12. EB U.S. Rt. 20 in Gary. EB U.S. Rt. 20 near IN St Rt 51. The guide marker on NB IN St Rt 51. EB U.S. Rt. 20 east of IN St Rt 51.
