US Bridges

I- 55 over Lemont RD

Good

DuPage County, Illinois · 1.5 M NW of Will CO · Structure no. 022203600000000

Built
2022
3 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
200 ft
2 main spans
Daily traffic
130,800
2024 count
Owner
State
State Highway Agency

About this bridge

I- 55 over Lemont RD is a steel continuous stringer/multi-beam or girder carrying I- 55 over Lemont RD in DuPage County, Illinois. It was built in 2022, so it is 3 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 130,800 vehicles a day, roughly 14% of them trucks, projected to reach 144,776 by 2040. The structure is 200 ft (61 m) long and 159 ft wide.

CarriesI- 55
CrossesLemont RD
Location1.5 M NW of Will CO
RouteInterstate 55
Coordinates41.71629, -88.00756
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation9: Superior to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating45 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length200 ft (61 m)
Longest span100 ft (30.5 m)
Deck width159 ft (48.4 m)
Roadway width153 ft (46.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic130,800 (2024)
Projected traffic144,776 by 2040
Trucks14%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 over Lemont RD built?

It was built in 2022, making it 3 years old in 2025.

What condition is I- 55 over Lemont RD 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 January 2024.

How much traffic does I- 55 over Lemont RD carry?

About 130,800 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is I- 55 over Lemont RD?

The structure is 200 ft (61 m) long with a longest span of 100 ft (30.5 m) and a deck 159 ft wide.

Who owns I- 55 over Lemont RD?

It is owned by the State Highway Agency.