US Bridges

Ch 1 / Sherman Rd. over I-55

Fair

Sangamon County, Illinois · .5M S Sherman Intchg · Structure no. 084008800000000

Built
1963
62 years old, rebuilt 1989
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
227 ft
4 main spans
Daily traffic
3,100
2022 count
Owner
State
State Highway Agency

About this bridge

Ch 1 / Sherman Rd. over I-55 is a steel continuous stringer/multi-beam or girder carrying Ch 1 / Sherman Rd. over I-55 in Sangamon County, Illinois. It was built in 1963 and reconstructed in 1989, so it is 62 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 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 3,100 vehicles a day, roughly 8% of them trucks, projected to reach 3,384 by 2046. The structure is 227 ft (69.3 m) long and 33 ft wide.

Location

Open in Google Maps
CarriesCh 1 / Sherman Rd.
CrossesI-55
Location.5M S Sherman Intchg
CountySangamon County
StateIllinois
Coordinates39.89579, -89.59567
Functional classUrban Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.4 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length227 ft (69.3 m)
Longest span69 ft (21 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,100 (2022)
Projected traffic3,384 by 2046
Trucks8%
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 Ch 1 / Sherman Rd. over I-55 built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1989.

What condition is Ch 1 / Sherman Rd. over I-55 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 May 2023.

How much traffic does Ch 1 / Sherman Rd. over I-55 carry?

About 3,100 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Ch 1 / Sherman Rd. over I-55?

The structure is 227 ft (69.3 m) long with a longest span of 69 ft (21 m) and a deck 33 ft wide.

Who owns Ch 1 / Sherman Rd. over I-55?

It is owned by the State Highway Agency.