US Bridges

I-55 (sb)/ I-72 (w over Lost Bridge Trail Bp

Good

Sangamon County, Illinois · .3M S IL29/S Grnd Av · Structure no. 084021000000000

Built
1995
30 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
136 ft
1 main span
Daily traffic
25,400
2023 count
Owner
State
State Highway Agency

About this bridge

I-55 (sb)/ I-72 (w over Lost Bridge Trail Bp is a prestressed concrete stringer/multi-beam or girder carrying I-55 (sb)/ I-72 (w over Lost Bridge Trail Bp in Sangamon County, Illinois. It was built in 1995, so it is 30 years old, younger 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 25,400 vehicles a day, roughly 24% of them trucks, projected to reach 26,412 by 2046. The structure is 136 ft (41.5 m) long and 76 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesI-55 (sb)/ I-72 (w
CrossesLost Bridge Trail Bp
Location.3M S IL29/S Grnd Av
RouteInterstate 55
CountySangamon County
StateIllinois
Coordinates39.78215, -89.60032
Functional classUrban Principal Arterial - Interstate

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.1 US tons
Inventory rating37.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length136 ft (41.5 m)
Longest span130 ft (39.6 m)
Deck width76 ft (23.1 m)
Roadway width73 ft (22.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,400 (2023)
Projected traffic26,412 by 2046
Trucks24%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesPedestrian / bicycle
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I-55 (sb)/ I-72 (w over Lost Bridge Trail Bp built?

It was built in 1995, making it 30 years old in 2025.

What condition is I-55 (sb)/ I-72 (w over Lost Bridge Trail Bp 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 April 2024.

How much traffic does I-55 (sb)/ I-72 (w over Lost Bridge Trail Bp carry?

About 25,400 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is I-55 (sb)/ I-72 (w over Lost Bridge Trail Bp?

The structure is 136 ft (41.5 m) long with a longest span of 130 ft (39.6 m) and a deck 76 ft wide.

Who owns I-55 (sb)/ I-72 (w over Lost Bridge Trail Bp?

It is owned by the State Highway Agency.