US Bridges

US 6 over I-355

Fair

Will County, Illinois · 0.9 M N of I-80 · Structure no. 099032100000000

Built
2007
18 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
421 ft
2 main spans
Daily traffic
13,300
2023 count
Owner
State
State Highway Agency

About this bridge

US 6 over I-355 is a steel continuous stringer/multi-beam or girder carrying US 6 over I-355 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 13,300 vehicles a day, roughly 9% of them trucks, projected to reach 29,088 by 2046. The structure is 421 ft (128.4 m) long and 89 ft wide.

Location

Open in Google Maps
CarriesUS 6
CrossesI-355
Location0.9 M N of I-80
RouteU.S. Route 6
CountyWill County
StateIllinois
Coordinates41.54814, -87.97438
Functional classUrban Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.9 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length421 ft (128.4 m)
Longest span181 ft (55.1 m)
Deck width89 ft (27.2 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,300 (2023)
Projected traffic29,088 by 2046
Trucks9%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 US 6 over I-355 built?

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

What condition is US 6 over I-355 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 August 2023.

How much traffic does US 6 over I-355 carry?

About 13,300 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is US 6 over I-355?

The structure is 421 ft (128.4 m) long with a longest span of 181 ft (55.1 m) and a deck 89 ft wide.

Who owns US 6 over I-355?

It is owned by the State Highway Agency.