US Bridges

I-55 SB over It RR (abandoned)

Fair

Logan County, Illinois · 2.8 M E I-55/155 Int · Structure no. 054005800000000

Built
1973
52 years old, rebuilt 2014
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
150 ft
3 main spans
Daily traffic
10,750
2023 count
Owner
State
State Highway Agency

About this bridge

I-55 SB over It RR (abandoned) is a steel continuous stringer/multi-beam or girder carrying I-55 SB over It RR (abandoned) in Logan County, Illinois. It was built in 1973 and reconstructed in 2014, so it is 52 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 10,750 vehicles a day, roughly 33% of them trucks, projected to reach 11,498 by 2046. The structure is 150 ft (45.6 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-55 SB
CrossesIt RR (abandoned)
Location2.8 M E I-55/155 Int
RouteInterstate 55
CountyLogan County
StateIllinois
Coordinates40.18149, -89.36364
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating72.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length150 ft (45.6 m)
Longest span54 ft (16.5 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,750 (2023)
Projected traffic11,498 by 2046
Trucks33%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-55 SB over It RR (abandoned) built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 2014.

What condition is I-55 SB over It RR (abandoned) in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2023.

How much traffic does I-55 SB over It RR (abandoned) carry?

About 10,750 vehicles per day (2023 count), of which roughly 33% are trucks.

How long is I-55 SB over It RR (abandoned)?

The structure is 150 ft (45.6 m) long with a longest span of 54 ft (16.5 m) and a deck 43 ft wide.

Who owns I-55 SB over It RR (abandoned)?

It is owned by the State Highway Agency.