US Bridges

TR 170 over I-57

Fair

Champaign County, Illinois · 1 MI N of Leverett · Structure no. 010017200000000

Built
1968
57 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
351 ft
4 main spans
Daily traffic
375
2021 count
Owner
State
State Highway Agency

About this bridge

TR 170 over I-57 is a steel continuous stringer/multi-beam or girder carrying TR 170 over I-57 in Champaign County, Illinois. It was built in 1968, so it is 57 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 375 vehicles a day, roughly 1% of them trucks, projected to reach 379 by 2046. The structure is 351 ft (107 m) long and 30 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesTR 170
CrossesI-57
Location1 MI N of Leverett
RouteCounty Highway 0
CountyChampaign County
StateIllinois
Coordinates40.20603, -88.22081
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating61.4 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length351 ft (107 m)
Longest span109 ft (33.1 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic375 (2021)
Projected traffic379 by 2046
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 km)
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 170 over I-57 built?

It was built in 1968, making it 57 years old in 2025.

What condition is TR 170 over I-57 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 December 2023.

How much traffic does TR 170 over I-57 carry?

About 375 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is TR 170 over I-57?

The structure is 351 ft (107 m) long with a longest span of 109 ft (33.1 m) and a deck 30 ft wide.

Who owns TR 170 over I-57?

It is owned by the State Highway Agency.