US Bridges

Chinatown Ramp NB over I- 55 Stevenson

Fair

Cook County, Illinois · 0.7 M E I-94 · Structure no. 016027100000000

Built
1965
60 years old, rebuilt 2002
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
503 ft
7 main spans
Daily traffic
32,600
2023 count
Owner
State
State Highway Agency

About this bridge

Chinatown Ramp NB over I- 55 Stevenson is a steel continuous stringer/multi-beam or girder carrying Chinatown Ramp NB over I- 55 Stevenson in Cook County, Illinois. It was built in 1965 and reconstructed in 2002, so it is 60 years old, older 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 5 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 32,600 vehicles a day, roughly 3% of them trucks, projected to reach 20,200 by 2046. The structure is 503 ft (153.3 m) long and 47 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesChinatown Ramp NB
CrossesI- 55 Stevenson
Location0.7 M E I-94
CountyCook County
StateIllinois
Coordinates41.84709, -87.63131
Functional classUrban Other Principal 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.4 US tons
Inventory rating46.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length503 ft (153.3 m)
Longest span90 ft (27.4 m)
Deck width47 ft (14.2 m)
Roadway width43 ft (13.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,600 (2023)
Projected traffic20,200 by 2046
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.9 mi (3 km)
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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$1.4 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Chinatown Ramp NB over I- 55 Stevenson built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2002.

What condition is Chinatown Ramp NB over I- 55 Stevenson 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 November 2024.

How much traffic does Chinatown Ramp NB over I- 55 Stevenson carry?

About 32,600 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Chinatown Ramp NB over I- 55 Stevenson?

The structure is 503 ft (153.3 m) long with a longest span of 90 ft (27.4 m) and a deck 47 ft wide.

Who owns Chinatown Ramp NB over I- 55 Stevenson?

It is owned by the State Highway Agency.