US Bridges

TR 277 over I-55

Good

Montgomery County, Illinois · 1.7M S Il 16 Int. · Structure no. 068005200000000

Built
1973
52 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
263 ft
2 main spans
Daily traffic
100
2020 count
Owner
State
State Highway Agency

About this bridge

TR 277 over I-55 is a steel continuous stringer/multi-beam or girder carrying TR 277 over I-55 in Montgomery County, Illinois. It was built in 1973, so it is 52 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 100 vehicles a day, roughly 23% of them trucks, projected to reach 101 by 2046. The structure is 263 ft (80.2 m) long and 30 ft wide.

Location

Open in Google Maps
CarriesTR 277
CrossesI-55
Location1.7M S Il 16 Int.
RouteCounty Highway 0
CountyMontgomery County
StateIllinois
Coordinates39.15408, -89.69602
Functional classRural Local

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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.7 US tons
Inventory rating27.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 15
Structure length263 ft (80.2 m)
Longest span108 ft (32.9 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2020)
Projected traffic101 by 2046
Trucks23%
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 TR 277 over I-55 built?

It was built in 1973, making it 52 years old in 2025.

What condition is TR 277 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 July 2023.

How much traffic does TR 277 over I-55 carry?

About 100 vehicles per day (2020 count), of which roughly 23% are trucks.

How long is TR 277 over I-55?

The structure is 263 ft (80.2 m) long with a longest span of 108 ft (32.9 m) and a deck 30 ft wide.

Who owns TR 277 over I-55?

It is owned by the State Highway Agency.