US Bridges

Sudduth Rd. FAU 80 over I-55

Good

Sangamon County, Illinois · .5M N Sherman Intchg · Structure no. 084010000000000

Built
1962
63 years old, rebuilt 1989
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
247 ft
4 main spans
Daily traffic
950
2022 count
Owner
State
State Highway Agency

About this bridge

Sudduth Rd. FAU 80 over I-55 is a steel continuous stringer/multi-beam or girder carrying Sudduth Rd. FAU 80 over I-55 in Sangamon County, Illinois. It was built in 1962 and reconstructed in 1989, so it is 63 years old, older 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 950 vehicles a day, roughly 17% of them trucks, projected to reach 960 by 2046. The structure is 247 ft (75.4 m) long and 31 ft wide.

CarriesSudduth Rd. FAU 80
CrossesI-55
Location.5M N Sherman Intchg
RouteCounty Highway 0
Coordinates39.91033, -89.59517
Functional classUrban Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.5 US tons
Inventory rating44 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length247 ft (75.4 m)
Longest span75 ft (22.8 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic950 (2022)
Projected traffic960 by 2046
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Sudduth Rd. FAU 80 over I-55 built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1989.

What condition is Sudduth Rd. FAU 80 over I-55 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 October 2024.

How much traffic does Sudduth Rd. FAU 80 over I-55 carry?

About 950 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is Sudduth Rd. FAU 80 over I-55?

The structure is 247 ft (75.4 m) long with a longest span of 75 ft (22.8 m) and a deck 31 ft wide.

Who owns Sudduth Rd. FAU 80 over I-55?

It is owned by the State Highway Agency.