US Bridges

Il 255 NB (fap 310 over Il 111

Good

Madison County, Illinois · N of Il 143 · Structure no. 060028900000000

Built
2001
24 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
165 ft
2 main spans
Daily traffic
22,700
2024 count
Owner
State
State Highway Agency

About this bridge

Il 255 NB (fap 310 over Il 111 is a steel continuous stringer/multi-beam or girder carrying Il 255 NB (fap 310 over Il 111 in Madison County, Illinois. It was built in 2001, so it is 24 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 22,700 vehicles a day, roughly 8% of them trucks, projected to reach 10,807 by 2046. The structure is 165 ft (50.4 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIl 255 NB (fap 310
CrossesIl 111
LocationN of Il 143
RouteState Highway 255
CountyMadison County
StateIllinois
Coordinates38.87122, -90.06003
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionNovember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97.1 US tons
Inventory rating58.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length165 ft (50.4 m)
Longest span84 ft (25.5 m)
Deck width43 ft (13 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,700 (2024)
Projected traffic10,807 by 2046
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 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 (fap 310 over Il 111 built?

It was built in 2001, making it 24 years old in 2025.

What condition is Il 255 NB (fap 310 over Il 111 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 November 2024.

How much traffic does Il 255 NB (fap 310 over Il 111 carry?

About 22,700 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Il 255 NB (fap 310 over Il 111?

The structure is 165 ft (50.4 m) long with a longest span of 84 ft (25.5 m) and a deck 43 ft wide.

Who owns Il 255 NB (fap 310 over Il 111?

It is owned by the State Highway Agency.