US Bridges

Il 255 NB over Ramp 255NB to 270WB

Fair

Madison County, Illinois · .20 MI N of FAI 270 · Structure no. 060023100000000

Built
1994
31 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
152 ft
1 main span
Daily traffic
36,500
2023 count
Owner
State
State Highway Agency

About this bridge

Il 255 NB over Ramp 255NB to 270WB is a steel continuous stringer/multi-beam or girder carrying Il 255 NB over Ramp 255NB to 270WB in Madison County, Illinois. It was built in 1994, so it is 31 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 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 36,500 vehicles a day, roughly 14% of them trucks, projected to reach 19,688 by 2046. The structure is 152 ft (46.3 m) long and 59 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesIl 255 NB
CrossesRamp 255NB to 270WB
Location.20 MI N of FAI 270
RouteState Highway 255
CountyMadison County
StateIllinois
Coordinates38.76023, -90.04357
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2024
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 rating76.4 US tons
Inventory rating45.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20 + Mod
Structure length152 ft (46.3 m)
Longest span95 ft (29.1 m)
Deck width59 ft (18 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,500 (2023)
Projected traffic19,688 by 2046
Trucks14%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Il 255 NB over Ramp 255NB to 270WB built?

It was built in 1994, making it 31 years old in 2025.

What condition is Il 255 NB over Ramp 255NB to 270WB 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 Il 255 NB over Ramp 255NB to 270WB carry?

About 36,500 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is Il 255 NB over Ramp 255NB to 270WB?

The structure is 152 ft (46.3 m) long with a longest span of 95 ft (29.1 m) and a deck 59 ft wide.

Who owns Il 255 NB over Ramp 255NB to 270WB?

It is owned by the State Highway Agency.