Interstate 255, IllinoisRoads of the Mid-South & West > Highways of the State of Illinois > Interstate 55, Illinois > Interstate 255, Illinois

Interstate 255

Interstate 255 in Illinois forms the majority of the Metro-East portion of the belt-loop for the St. Louis Metro. I-255 enters Illinois at the J.B. Bridges on the southeastern side of the StL Metro and heads north and ends at the junction of Interstate 270 and Illinois State Route 255 on the north east side of the metro area.

Southbound I-255 near Mousette Lane in Centreville, IL


While in Illinois I-255 is multi-plexed several times...

I-255 is multi-plexed with...
...U.S. Rt. 50, from the Missouri/Illinois State Line to Interstate 64.

...Illinois State Route 3, from MP6 to MP10.



Southbound I-255 near the J.B. Bridge at the Mississippi River south of Downtown St. Louis, MO.


Interstates that I-255 crosses in Illinois.


Interstate 64, at Caseyville/East St. Louis.

The one mile BGS on SB I-255.

Overhead lane marker on SB I-255.

BGS on SB I-255.

Overhead BGS's at the ramp to I-64 on SB I-255.

A BGS on SB I-255 two miles from I-64/U.S. Rt. 50. (July, 2017)

SB I-255 one mile from I-64/U.S. Rt. 50. (July, 2017)

SB I-255 near I-64/U.S. Rt. 50. (July, 2017)

A BGS a quarter mile from I-64/U.S. Rt. 50 on SB I-255. (July, 2017)

A BGS on SB I-255, two miles from I-64. (August, 2018)

A BGS on SB I-255 one mile from I-64. (August, 2018)

A lane marker on SB I-255. (August, 2018)

A BGS near I-64 on SB I-255. (August, 2018)

SB I-255 at I-64. (August, 2018)

The first BGS on NB I-255/EB U.S. Rt. 50 south of IL St Rt 15.

A BGS on NB I-255/EB U.S. Rt. 50 over one mile.

A BGS on NB I-255/EB U.S. Rt. 50.

NB I-255/EB U.S. Rt. 50 at I-64.

Interstate 55, at Collinsville
Interstate 70, at Collinsville

The first BGS on SB I-255.

Another BGS on SB I-255.

The BGS on NB I-255 for SB I-55/WB I-70.

SB I-255 two miles from I-55/70. (July, 2017)

SB I-255 one mile from I-55/70. (July, 2017)

A BGS for SB I-55/WB I-70 on SB I-255. (July, 2017)

SB I-255 at SB I-55/WB I-70. (July, 2017)

A BGS for NB I-55/EB I-70 on SB I-255. (July, 2017)

SB I-255 at NB I-55/EB I-70. (July, 2017)

The first BGS on NB I-255.

The one mile BGS on NB I-255.

A BGS near I-55/70.

The overhead BGS's on NB I-255.

NB I-255 over two miles from I-55/70. (August, 2022)

NB I-255 one mile from I-55/70. (August, 2022)

A BGS on NB I-255 for NB I-55/EB I-70. (August, 2022)

NB I-255 at I-55/70. (August, 2022)
Interstate 270, at Pontoon Beach

The BGS one mile from NB I-270.

NB I-255 one mile from I-270.

NB I-255 near I-270.

NB I-255 at I-270.

NB I-255 one mile from I-270. (March, 2019)

NB I-255 near I-270. (March, 2019)

NB I-255 at I-270. (March, 2019)


Info on I-255's parent route.



SB I-255/WB U.S. Rt. 50 at the Mississippi River.

SB I-255/WB U.S. Rt. 50 at the Mississippi River.

SB I-255/WB U.S. Rt. 50 at the J.B. Bridge.

SB I-255/WB U.S. Rt. 50 crossing the Mississippi River.

NB I-255/EB U.S. Rt. 50 on the Illinois side of the JB Bridge.

NB I-255/EB U.S. Rt. 50 at the Illinois Welcome sign. (2006)

A closer look at the signs in the photo above. (2002)

NB I-255/EB U.S. Rt. 50 at the Illinois Welcome sign. (September, 2007)

NB I-255/EB U.S. Rt. 50 at the Illinois Welcome sign. (June, 2022)

A mileage sign on SB I-255/WB U.S. Rt. 50.

SB I-255/WB U.S. Rt. 50 west of IL St Rt 3-Columbia Interchange.

SB I-255/WB U.S. Rt. 50 at the IL St Rt 3-Columbia Interchange.

NB I-255/EB U.S. Rt. 50 at south IL St Rt 3-Columbia Interchange.

A BGS on NB I-255/EB U.S. Rt. 50.

A BGS on NB I-255/EB U.S. Rt. 50.

A BGS on NB IL St Rt 3.

A set of overhead BGS's on NB IL St Rt 3.

A BGS on SB I-255/IL St Rt 3; WB U.S. Rt. 50.

A BGS on SB I-255/IL St Rt 3; WB U.S. Rt. 50.

A BGS on SB I-255/IL St Rt 3; WB U.S. Rt. 50.

SB I-255/IL St Rt 3; WB U.S. Rt. 50 near Columbia, IL.

SB I-255/IL St Rt 3; WB U.S. Rt. 50 south of the Monroe/St. Clair County Line.

SB I-255/IL St Rt 3; WB U.S. Rt. 50 at the Monroe/St. Clair County Line.

SB I-255/IL St Rt 3; WB U.S. Rt. 50 at the Monroe/St. Clair County Line.

NB I-255/IL St Rt 3; EB U.S. Rt. 50 at the Monroe/St. Clair County Line.

SB I-255/IL St Rt 3; WB U.S. Rt. 50 one mile from the IL St Rt 3-Columbia Interchange.

A BGS on SB I-255/IL St Rt 3; WB U.S. Rt. 50.

NB I-255/IL St Rt 3; EB U.S. Rt. 50 north of the Monroe/St. Clair County Line.

SB I-255 just past IL Rt. 3 interchange near Dupo, IL.

A set of junction markers on NB Old IL St Rt 3.

A set of guide markers on SB Old IL St Rt 3 in Dupo.

NB I-255/EB U.S. Rt. 50 at IL St Rt 3 near Dupo.

SB I-255/WB U.S. Rt. 50 north of IL St Rt 3, near Dupo.

NB I-255/EB U.S. Rt. 50 north of IL St Rt 3.

SB I-255/WB U.S. Rt. 50 at IL St Rt 157.

SB I-255/WB U.S. Rt. 50 south of IL St Rt 15.

A BGS on EB IL St Rt 15.

A BGS on EB IL St Rt 15.

A BGS on WB IL St Rt 15.

SB I-255/WB U.S. Rt. 50 at IL St Rt 15.

SB I-255/WB U.S. Rt. 50 near Lake Drive in East St. Louis.

SB I-255/WB U.S. Rt. 50 near State Street in East St Louis.

NB I-255/U.S. Rt. 50 near Frank Holten State Park.

A replica of the birdman tablet found at Cahokia Mounds in 1971. This is found on most of the bridge sides on I-255.

A painted version of the birdman replics.

A BGS on WB I-64/U.S. Rt. 50.

A BGS on the ramp from WB I-64/U.S. Rt. 50 to I-255.

Overhead sign on EB I-64.

SB I-255 at I-64/U.S. Rt. 50.

SB guide marker on I-255.

A mile marker on SB I-255.

SB I-255 near Caseyville.

A SB guide marker with the interstate system shield and the 50th anniversary shield.

A BGS in Collinsville.

A BGS in Collinsville.

NB I-255 near Collinsville.

SB I-255 south of I-55/70; U.S. Rt. 40.

A BGS on SB I-55; WB I-70/U.S. Rt. 40.

A BGS on SB I-55; WB I-70/U.S. Rt. 40.

A tourist sign on SB I-55; WB I-70/U.S. Rt. 40.

A set of BGS's on the ramp from SB I-55; WB I-70/U.S. Rt. 40.

A BGS on SB I-55; WB I-70/U.S. Rt. 40. (May, 2022)

A BGS on SB I-55; WB I-70/U.S. Rt. 40. (May, 2022)

NB I-255 at the Madison/St. Clair County Line.

SB I-255 at the Madison/St. Clair County Line.

A guide marker in Madison.

A set of guide markers on EB IL St Rt 162.

A guide BGS on Horseshoe Lake Road.

NB I-255 at Horseshoe Lake Road.

A guide marker on NB IL St Rt 203.

SB I-255 south of IL St Rt 162.

NB I-255 at IL St Rt 162. NOTE: The control city.

A BGS on SB I-255.

SB I-255 near IL St Rt 162.

SB I-255 south of I-270/IL St Rt 255.

A BGS on EB I-270.

A guide sign on EB I-270.

A BGS on the ramp from EB I-270.

1 July 2023