US Bridges

Allentown RD over I-155

Fair

Tazewell County, Illinois · 2 MI N of Ill 9 · Structure no. 090013300000000

Built
1992
33 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
215 ft
2 main spans
Daily traffic
850
2023 count
Owner
State
State Highway Agency

About this bridge

Allentown RD over I-155 is a steel continuous stringer/multi-beam or girder carrying Allentown RD over I-155 in Tazewell County, Illinois. It was built in 1992, so it is 33 years old, younger 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 850 vehicles a day, roughly 9% of them trucks, projected to reach 556 by 2046. The structure is 215 ft (65.6 m) long and 37 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesAllentown RD
CrossesI-155
Location2 MI N of Ill 9
RouteCounty Highway 0
CountyTazewell County
StateIllinois
Coordinates40.55415, -89.47789
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60.7 US tons
Inventory rating36.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length215 ft (65.6 m)
Longest span91 ft (27.8 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic850 (2023)
Projected traffic556 by 2046
Trucks9%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

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 Allentown RD over I-155 built?

It was built in 1992, making it 33 years old in 2025.

What condition is Allentown RD over I-155 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 June 2024.

How much traffic does Allentown RD over I-155 carry?

About 850 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Allentown RD over I-155?

The structure is 215 ft (65.6 m) long with a longest span of 91 ft (27.8 m) and a deck 37 ft wide.

Who owns Allentown RD over I-155?

It is owned by the State Highway Agency.