US Bridges

I-55/64; US 40 EB over Ramps To/From Mlk DR

Fair

St. Clair County, Illinois · E ST Louis · Structure no. 082002300000000

Built
1961
64 years old, rebuilt 1993
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
94 ft
2 main spans
Daily traffic
52,650
2024 count
Owner
State
State Highway Agency

About this bridge

I-55/64; US 40 EB over Ramps To/From Mlk DR is a steel continuous stringer/multi-beam or girder carrying I-55/64; US 40 EB over Ramps To/From Mlk DR in St. Clair County, Illinois. It was built in 1961 and reconstructed in 1993, so it is 64 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 52,650 vehicles a day, roughly 12% of them trucks, projected to reach 53,177 by 2046. The structure is 94 ft (28.7 m) long and 49 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesI-55/64; US 40 EB
CrossesRamps To/From Mlk DR
LocationE ST Louis
RouteInterstate 55
CountySt. Clair County
StateIllinois
Coordinates38.62933, -90.15668
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.3 US tons
Inventory rating41.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length94 ft (28.7 m)
Longest span50 ft (15.2 m)
Deck width49 ft (15 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic52,650 (2024)
Projected traffic53,177 by 2046
Trucks12%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed9.9 mi (16 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-55/64; US 40 EB over Ramps To/From Mlk DR built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1993.

What condition is I-55/64; US 40 EB over Ramps To/From Mlk DR 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-55/64; US 40 EB over Ramps To/From Mlk DR carry?

About 52,650 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is I-55/64; US 40 EB over Ramps To/From Mlk DR?

The structure is 94 ft (28.7 m) long with a longest span of 50 ft (15.2 m) and a deck 49 ft wide.

Who owns I-55/64; US 40 EB over Ramps To/From Mlk DR?

It is owned by the State Highway Agency.