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Il-390 (EB) over Prospect Ave

DuPage County, Illinois · rated Good in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Il-390 (EB) over Prospect Ave in DuPage County, Illinois, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 7 (good condition) on the 0-9 scale.
It was built in 2017, making it 8 years old at the 2025 inventory.
It carries about 27,100 vehicles a day (traffic count year 2023).
It is one of 124 of the 345 inventoried bridges in DuPage County rated good (35.9%); 26 (7.5%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Continuous prestressed concrete stringer or multi-beam girder
Length	about 227 ft
Location	1.3 Mi E. of I 290
NBI structure number	022900100000000
Condition class	Good

Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.

Bridge	Built	Vehicles/day	Condition
I-88 over I-355	1989	169,900	Fair
I-88 over I-355 NB to I-88 WB	1989	169,900	Fair
I- 55 over Madison St	1959	150,000	Fair
I-355 NB & SB over US-34	1989	147,200	Fair
I-355 over Bn RR	1989	147,200	Good
I-355 NB & SB over Hitchcock Ave.	1989	147,200	Fair