US Bridges

I-355 SB to I-88 E over I-355 Finley & I-88

Fair

DuPage County, Illinois · 1.3 M.E. of IL-53 · Structure no. 022997100000000

Built
1989
36 years old
Condition
Fair
inspected June 2024
Type
Segmental Box Girder
Prestressed Concrete
Length
1,964 ft
12 main spans
Daily traffic
17,250
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-355 SB to I-88 E over I-355 Finley & I-88 is a prestressed concrete segmental box girder carrying I-355 SB to I-88 E over I-355 Finley & I-88 in DuPage County, Illinois. It was built in 1989, so it is 36 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 17,250 vehicles a day, roughly 14% of them trucks, projected to reach 20,705 by 2046. The structure is 1,964 ft (598.6 m) long and 37 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesI-355 SB to I-88 E
CrossesI-355 Finley & I-88
Location1.3 M.E. of IL-53
CountyDuPage County
StateIllinois
Coordinates41.82726, -88.02891
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
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 rating75.7 US tons
Inventory rating45.7 US tons

Structure

Structure typeSegmental Box Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans12
Design loadHS 20
Structure length1,964 ft (598.6 m)
Longest span164 ft (49.9 m)
Deck width37 ft (11.3 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,250 (2023)
Projected traffic20,705 by 2046
Trucks14%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
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-355 SB to I-88 E over I-355 Finley & I-88 built?

It was built in 1989, making it 36 years old in 2025.

What condition is I-355 SB to I-88 E over I-355 Finley & I-88 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-355 SB to I-88 E over I-355 Finley & I-88 carry?

About 17,250 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is I-355 SB to I-88 E over I-355 Finley & I-88?

The structure is 1,964 ft (598.6 m) long with a longest span of 164 ft (49.9 m) and a deck 37 ft wide.

Who owns I-355 SB to I-88 E over I-355 Finley & I-88?

It is owned by the State Toll Authority.