US Bridges

I 24 EB over US 45

Fair

Johnson County, Illinois · 1.5 MI N of Vienna · Structure no. 044004000000000

Built
1971
54 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
181 ft
2 main spans
Daily traffic
10,000
2024 count
Owner
State
State Highway Agency

About this bridge

I 24 EB over US 45 is a prestressed concrete continuous stringer/multi-beam or girder carrying I 24 EB over US 45 in Johnson County, Illinois. It was built in 1971, so it is 54 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 5 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 10,000 vehicles a day, roughly 37% of them trucks, projected to reach 11,025 by 2046. The structure is 181 ft (55.3 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 24 EB
CrossesUS 45
Location1.5 MI N of Vienna
RouteInterstate 24
Coordinates37.44637, -88.88705
Functional classRural 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.5 US tons
Inventory rating41.8 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20 + Mod
Structure length181 ft (55.3 m)
Longest span63 ft (19.1 m)
Deck width42 ft (12.7 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2024)
Projected traffic11,025 by 2046
Trucks37%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
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 24 EB over US 45 built?

It was built in 1971, making it 54 years old in 2025.

What condition is I 24 EB over US 45 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 July 2024.

How much traffic does I 24 EB over US 45 carry?

About 10,000 vehicles per day (2024 count), of which roughly 37% are trucks.

How long is I 24 EB over US 45?

The structure is 181 ft (55.3 m) long with a longest span of 63 ft (19.1 m) and a deck 42 ft wide.

Who owns I 24 EB over US 45?

It is owned by the State Highway Agency.