U.S. Federal Route 41 runs north-south through Lake County. The entire lenghts of this highway in the county is multi-lane divided. U.S. Rt. 41 passes through the following towns in Lake County. Highland Park
Lake Forest
Lake Bluff
North Chicago Waukegan
Gurnee
Wadsworth
U.S. Rt. 41 is multi-plexed in Lake County. Interstate 41, from Wadsworth to the Wisconsin/Illinois State Line. Interstate 94, from Wadsworth to the Wisconsin/Illinois State Line.
U.S. Rt. 41 intersects the following highways in Lake County. Illinois State Route 22, at Highland Park.
NB U.S. Rt. 41 at the Lake/Cook County Line. NB U.S. Rt. 41 at Calvey Road. NB U.S. Rt. 41 at Chantilly. NB U.S. Rt. 41 south of Central. NB U.S. Rt. 41 south of Central. NB U.S. Rt. 41 at Central. A guide marker in Highland Park. NB U.S. Rt. 41 at Deerfield Road. NB U.S. Rt. 41 at Deerfield Road. NB U.S. Rt. 41 north of Deerfield Road. NB U.S. Rt. 41 south of Park. NB U.S. Rt. 41 at Park. NB U.S. Rt. 41 north of Park. NB U.S. Rt. 41 south of Half Day Road. A junction marker on EB Half Day Road. SB U.S. Rt. 41 in Lake Forest south of IL St Rt 60. A street sign at the intersection of U.S. Rt. 41 and IL St. Rt. 60. NB U.S. Rt. 41 in Lake Forest. NB U.S. Rt. 41 near IL St. Rt. 176. NB U.S. Rt. 41 south of IL St Rt 21. NB U.S. Rt. 41 south of IL St Rt 173. A junction marker on EB IL St Rt 137. NB U.S. Rt. 41 south of Wadsworth Road. NB U.S. Rt. 41 north of IL St Rt 173. A guide marker on LCH A9. WB I-94/SB U.S. Rt. 41 at their split. SB I-41/U.S. Rt. 41; EB I-94 at their split. BGS on WB I-94/SB U.S. Rt. 41 in Wisconsin for their split just south of the Wisconsin/Illinois State Line. The first BGS south of the state line. NOTE: The non-cut out shield. A BGS on SB I-41/EB I-94/SB U.S. Rt. 41. A BGS on SB I-41/U.S. Rt. 41; EB I-94. NB I-41/U.S. Rt. 41; WB I-94 at Lake County Highway A1. (July, 2015) NB I-41/U.S. Rt. 41; WB I-94 at Lake County Highway A1. (February, 2016) A junction marker on WB LCH A1. A junction marker on WB LCH A1. A BGS on WB LCH A1. A guide marker along Russell Road. A guide marker on NB Frontage Road. A guide marker on SB Frontage Road. A guide marker on SB Frontage Road. EB I-94/SB U.S. Rt. 41 at the Illinois Welcome sign. SB I-41/U.S. Rt. 41; EB I-94 at the Illinois Welcome sign. (February,2016) SB I-41/U.S. Rt. 41; EB I-94 at the Illinois Welcome Sign. (April, 2022) EB I-94/SB U.S. Rt. 41 at the Illinois/Wisconsin State Line. State line marker at the Wisconsin/Illinois State Line on WB I-94/SB U.S. Rt. 41.
