US Bridges

255 SB Collector over I-270

Fair

Madison County, Illinois · 1.9 M W of Il 157 · Structure no. 060024300000000

Built
1994
31 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
333 ft
3 main spans
Daily traffic
3,750
2022 count
Owner
State
State Highway Agency

About this bridge

255 SB Collector over I-270 is a steel continuous stringer/multi-beam or girder carrying 255 SB Collector over I-270 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 6 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 3,750 vehicles a day, roughly 15% of them trucks, projected to reach 3,745 by 2046. The structure is 333 ft (101.5 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries255 SB Collector
CrossesI-270
Location1.9 M W of Il 157
CountyMadison County
StateIllinois
Coordinates38.75726, -90.04409
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.5 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20 + Mod
Structure length333 ft (101.5 m)
Longest span109 ft (33.1 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,750 (2022)
Projected traffic3,745 by 2046
Trucks15%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
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 255 SB Collector over I-270 built?

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

What condition is 255 SB Collector over I-270 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 255 SB Collector over I-270 carry?

About 3,750 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is 255 SB Collector over I-270?

The structure is 333 ft (101.5 m) long with a longest span of 109 ft (33.1 m) and a deck 41 ft wide.

Who owns 255 SB Collector over I-270?

It is owned by the State Highway Agency.