Structure 16960600000000 · Cook County, IL

I-90 WB Jayne Adam over Mt. Prospect Road

Carries I-90 WB Jayne Adam over Mt. Prospect Road, 2 Mi E. Ill RTE 83.

Overall conditionGood

Set by its lowest-rated component: Substructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT103 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

103 ft end to end. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built201511 years old
Length103.3 ft31.5 m
Daily traffic163,300counted 2023
Last inspectedJuly 2023every 24 months

Location

StateIllinois
CountyCook
Location2 Mi E. Ill RTE 83
CarriesI-90 WB Jayne Adam
CrossesMt. Prospect Road
Coordinates42.01331, -87.92097

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length103.3 ft (31.5 m)
Max Span101.0 ft (30.8 m)
Deck Width119.8 ft (36.5 m)
Deck Area1149.8 sq m
Main Spans1
Year Built2015

Traffic

Avg Daily Traffic163,300 (2023)
Truck Traffic7%
Lanes On Bridge5
Lanes Under Bridge4

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerState Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number016960600000000

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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