Roads of the Mid-South & West > Highways of the State of Missouri > Interstate 55, Missouri > Interstate 255, Missouri

Interstate 255

Interstate 255 is a 3 mile section of the belt-loop around the St. Louis Metro area. It runs East-West from Interstate 55/270 to the Illinois/Missouri State Line.


WB I-255/U.S. Rt. 50 just past M.P. 3.

While in Missouri I-255 is multi-plexed.

I-255 is multi-plexed with...

...U.S. Rt. 50, from the Illinois State Line to M.P. 1 in Mehlville.


Interstates that I-255 crosses in Missouri...
Interstate 55, at Mehlville/Lemay, MO
Interstate 270, at Mehlville/Leamy, MO

The first BGS on WB I-255/U.S. Rt. 50.

A BGS 3/4 mile from I-55.

A mileage sign on WB I-255.

A BGS near I-55.

WB I-255 at I-55.

WB I-255/WB U.S. Rt. 50 over one mile from I-55. (August, 2018)

WB I-255/WB U.S. Rt. 50 under one mile from I-55. (August, 2018)

WB I-255 near I-55/270. (August, 2018)

SB I-255 at NB I-55. (August, 2018)

WB I-255 at SB I-55. (August, 2018)

EB I-270 at I-55/255.

A BGS under two miles from I-55 on WB I-255. (June, 2022)

WB I-255 under one mile from I-55. (June, 2022)

WB I-255 near I-55. (June, 2022)

WB I-255 at I-55/270. (June, 2022)

WB I-255/U.S. Rt. 50 over one mile from I-55/270. (December, 2024)

WB I-255/U.S. Rt. 50 one mile from I-55/270. (December, 2024)

WB I-255 near I-55/270. (December, 2024)

WB I-255 at NB I-55/WB I-270. (December, 2024)

WB I-255 at SB I-55/WB I-270. (December, 2024)


Click below for inforomation on Interstate 255 in Illinois...


Info on the parent highway of I-255.




Construction warning sign on NB IL St Rt 3 in Columbia, IL. (Sept. 2003)

SB I-255/WB U.S. Rt. 50 at the Missouri State Line. (August, 2014)

WB I-255/U.S. Rt. 50 at the Missouri State Line. (December, 2024)

WB I-255/U.S. Rt. 50 crossing the J.B. Bridge. (December, 2024)

EB I-255/U.S. Rt. 50 crossing the JB Bridge.

EB I-255/U.S. Rt. 50 at the JB Bridge.

EB I-255/U.S. Rt. 50 near the JB Bridge.

WB I-255/U.S. Rt. 50 at the Missouri Welcome Sign.

WB I-255/U.S. Rt. 50 at the Missouri Welcome Sign. (August, 2011)

WB I-255/U.S. Rt. 50 at the Missouri Welcome Sign. (December, 2024)

WB I-255/U.S. Rt. 50 west of Koch Road.

EB I-255/U.S. Rt. 50 at Koch Road. (May, 2023)

EB I-255/U.S. Rt. 50 at Koch Road. (September, 2025)

WB I-255/U.S. Rt. 50 at Koch Road. (December, 2024)

WB I-255/U.S. Rt. 50 at MO St Rt 231. (August, 2018)

WB I-255/U.S. Rt. 50 at MO St Rt 231. (December, 2024)

A set of guide markers on SB MO St Rt 231.

A BGS on NB MO St Rt 231.

A guide marker on SB MO St Rt 267.

EB I-255/U.S. Rt. 50 easst of Lemay Ferry Road.

WB I-255/U.S. Rt. 50 near Lemay Ferry Road.

A BGS for I-55/255/270 on a ramp from U.S. 50/61/67.

WB I-255 west of U.S. Rt. 50/61/67. (August, 2018)

WB I-255 west of U.S. Rt. 50/61/67. (December, 2024)

EB I-255 at Lemay Ferry Road.

WB I-255 east of I-55/270.

A BGS on NB I-55.

A BGS on EB I-255. (June, 2022)

A BGS on EB I-44.

A BGS on EB I-44.

A BGS on SB I-55.

A BGS on NB I-55.

The western end of I-255.

The western end marker.

Sign indcating the end of I-270 in South County.

27 March 2026