US Bridges

I-90 N B over US 20 Br

Good

Winnebago County, Illinois · 2 MI E Rockford · Structure no. 101996800000000

Built
2009
16 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
173 ft
2 main spans
Daily traffic
36,350
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-90 N B over US 20 Br is a prestressed concrete stringer/multi-beam or girder carrying I-90 N B over US 20 Br in Winnebago County, Illinois. It was built in 2009, so it is 16 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 36,350 vehicles a day, roughly 18% of them trucks, projected to reach 29,593 by 2046. The structure is 173 ft (52.8 m) long and 63 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-90 N B
CrossesUS 20 Br
Location2 MI E Rockford
RouteInterstate 39
CountyWinnebago County
StateIllinois
Coordinates42.27075, -88.96495
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.6 US tons
Inventory rating44.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length173 ft (52.8 m)
Longest span84 ft (25.6 m)
Deck width63 ft (19.1 m)
Roadway width59 ft (18.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,350 (2023)
Projected traffic29,593 by 2046
Trucks18%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a toll road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-90 N B over US 20 Br built?

It was built in 2009, making it 16 years old in 2025.

What condition is I-90 N B over US 20 Br in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

How much traffic does I-90 N B over US 20 Br carry?

About 36,350 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is I-90 N B over US 20 Br?

The structure is 173 ft (52.8 m) long with a longest span of 84 ft (25.6 m) and a deck 63 ft wide.

Who owns I-90 N B over US 20 Br?

It is owned by the State Toll Authority.