US Bridges

I- 55 SB to I-355 over I-355 I-55 Ramps

Fair

Will County, Illinois · 1 M W of Lemont RD · Structure no. 099301300000000

Built
2007
18 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
2,658 ft
16 main spans
Daily traffic
4,600
2023 count
Owner
State
State Highway Agency

About this bridge

I- 55 SB to I-355 over I-355 I-55 Ramps is a steel continuous stringer/multi-beam or girder carrying I- 55 SB to I-355 over I-355 I-55 Ramps in Will County, Illinois. It was built in 2007, so it is 18 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 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 4,600 vehicles a day, roughly 26% of them trucks, projected to reach 7,344 by 2046. The structure is 2,658 ft (810.2 m) long and 37 ft wide.

Location

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CarriesI- 55 SB to I-355
CrossesI-355 I-55 Ramps
Location1 M W of Lemont RD
CountyWill County
StateIllinois
Coordinates41.70741, -88.03042
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.9 US tons
Inventory rating50.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans16
Design loadHS 20
Structure length2,658 ft (810.2 m)
Longest span225 ft (68.6 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,600 (2023)
Projected traffic7,344 by 2046
Trucks26%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

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 to I-355 over I-355 I-55 Ramps built?

It was built in 2007, making it 18 years old in 2025.

What condition is I- 55 SB to I-355 over I-355 I-55 Ramps 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 I- 55 SB to I-355 over I-355 I-55 Ramps carry?

About 4,600 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is I- 55 SB to I-355 over I-355 I-55 Ramps?

The structure is 2,658 ft (810.2 m) long with a longest span of 225 ft (68.6 m) and a deck 37 ft wide.

Who owns I- 55 SB to I-355 over I-355 I-55 Ramps?

It is owned by the State Highway Agency.