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 94, from Wadsworth to the Wisconsin/Illinois State Line.
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. A junction marker on EB IL St Rt 137. WB I-94/SB U.S. Rt. 41 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. EB I-94/SB U.S. Rt. 41 at the Illinois Welcome sign. 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.