US Bridges

TR 48 over I-55

Fair

Montgomery County, Illinois · 2.4M N Il 16 Int. · Structure no. 068004700000000

Built
1973
52 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
308 ft
2 main spans
Daily traffic
275
2020 count
Owner
State
State Highway Agency

About this bridge

TR 48 over I-55 is a steel continuous stringer/multi-beam or girder carrying TR 48 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 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 275 vehicles a day, roughly 34% of them trucks, projected to reach 278 by 2046. The structure is 308 ft (93.9 m) long and 32 ft wide.

Location

Open in Google Maps
CarriesTR 48
CrossesI-55
Location2.4M N Il 16 Int.
RouteCounty Highway 0
CountyMontgomery County
StateIllinois
Coordinates39.20487, -89.65922
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
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 alignment6: Equal to present minimum criteria
Operating rating59.6 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 length308 ft (93.9 m)
Longest span121 ft (36.9 m)
Deck width32 ft (9.7 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic275 (2020)
Projected traffic278 by 2046
Trucks34%
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 48 over I-55 built?

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

What condition is TR 48 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 March 2024.

How much traffic does TR 48 over I-55 carry?

About 275 vehicles per day (2020 count), of which roughly 34% are trucks.

How long is TR 48 over I-55?

The structure is 308 ft (93.9 m) long with a longest span of 121 ft (36.9 m) and a deck 32 ft wide.

Who owns TR 48 over I-55?

It is owned by the State Highway Agency.