U.S. Federal Route 40 runs completly in the Interstate 55/70 corridor in St. Clair County. Much of this is on the Poplar Street Bridge Complex. U.S. Rt. 40 passes through the following towns in St. Clair County. Fairmont City
Madison
East St Louis
U.S. Rt. 40 is multi-plexed in St. Clair County. Interstate 55, through St. Clair County. Interstate 70, from the Madison/St. Clair County Line to East St. Louis. Interstate 64, at East St Louis.
NB I-55; EB I-64/U.S. Rt. 40 at the Illinois/Missouri State Line. NB I-55; EB I-64/U.S. Rt. 40 at the Illinois/Missouri State Line. Overhead signage just over the Illinois State Line at the Poplar Street Bridge, St. Louis, MO. A BGS on NB I-55; EB I-64/U.S. Rt. 40. SB I-55; WB I-64/U.S. Rt. 40 as seen from the Union Pacific railroad overpass in the photo above. SB I-55; WB I-64/U.S. Rt. 40 at IL St Rt 3. NB I-55; EB I-64/U.S. Rt. 40 at south IL St Rt 3. A BGS on SB I-55/IL St Rt 3; WB I-64/U.S. Rt. 40. SB I-55; WB I-64/U.S. Rt. 40 at south IL St Rt 3. NB I-55/IL St Rt 3; EB I-64/U.S. Rt. 40 at Tudor. Looking north along I-55/64; U.S. 40; IL in East St. Louis. Photo from SB I-55/IL St Rt 3; WB I-64/U.S. 40 to Tudor Ave. The Illinois Welcome Sign on NB I-55/IL St Rt 3; EB I-64/U.S. Rt. 40. (September, 2007) A BGS on SB I-55/IL St Rt 3; WB I-64/U.S. Rt. 40. A BGS on Tudor Ave. SB I-55/IL St Rt 3; WB I-64/U.S. Rt. 40 at 3rd Street in East St. Louis. SB I-55/IL St Rt 3; WB I-64/U.S. Rt. 40 at the King Bridge exit. SB I-55/IL St Rt 3; WB I-64/U.S. Rt. 40 at the King Bridge exit. A BGS on SB I-55/IL St Rt 3; WB I-64/U.S. Rt. 40. A BGS in East St. Louis. A BGS on the MLK Bridge. SB I-55/IL St Rt 3; WB I-64/U.S. Rt. 40 south of I-70 in East St. Louis. WB I-64/U.S. Rt. 40; SB I-55; IL St Rt 3 south of I-70 in East St. Louis. A BGS on NB IL St Rt 3. NB I-55; EB I-64/U.S. Rt. 40 at M.P. 2.4. NB I-55; EB I-64/U.S. Rt. 40 at the I-64 split. NB I-55/EB U.S. Rt. 40 at I-64/70. Looking south along I-55/70; U.S. Rt. 40 from Exchange Ave. in East. St. Louis. SB I-55/WB U.S. Rt. 40 at the interchange in East St. Louis with I-64/70; IL St Rt 3. SB I-55; WB I-70/U.S. Rt. 40 at the East St. Louis interchange. (July, 2014) SB I-55/WB U.S. Rt. 40 at I-64. (May, 2022) SB I-55; WB I-70/U.S. Rt. 40 near the East St. Louis interchange. (July, 2014) SB I-55; WB I-70/U.S. Rt. 40 near I-64. (May, 2022) A BGS on NB I-55; EB I-70/U.S. Rt. 40. SB I-55; WB I-70/U.S. Rt. 40 a half mile from the East St. Louis interchange. (July, 2014) SB I-55; WB I-70/U.S. Rt. 40 under one mile from I-64. (May, 2022) NB I-55; EB I-70/U.S. Rt. 40 near IL St Rt 203. SB I-55; WB I-70/U.S. Rt. 40 at IL St Rt 203. SB I-55; WB I-70/U.S. Rt. 40 at IL St Rt 203. SB I-55; WB I-70/U.S. Rt. 40 two miles from the East St. Louis interchange. (July, 2014) SB I-55; WB I-70/U.S. Rt. 40 two miles from I-64. (May, 2022) NB I-55; EB I-70/U.S. Rt. 40 north of IL St Rt 203. SB I-55; WB I-70/U.S. Rt. 40 at the Madison/St. Clair County Line.
