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over I-72 / US 36
3M W ILLIOPOLIS INT.
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This bridge has a Poor overall condition rating of 4 out of 9. This bridge is classified as being in poor condition, meaning one or more structural components have significant deterioration. Poor condition does not mean the bridge is unsafe to drive on, but it does mean repairs or replacement may be needed.
The bridge carries 10 vehicles per day and is 52 years old.
Its sufficiency rating of 46.4 places it below the national average of 63.6.
The NBI records a navigation clearance of 16 feet — the minimum vertical space below the bridge deck. The total height of the bridge structure (including towers, railings, and superstructure) may be higher.
For travelers with bridge anxiety
This bridge may cause some awareness for travelers with bridge anxiety, but has manageable characteristics.
This bridge is 274 feet long — a short crossing, about 10-15 seconds.
A standard overpass design with solid barriers on each side.
About 16 feet above ground — standard overpass height.
Only about 10 vehicles cross daily — very light traffic with low congestion risk.
The deck is 32 feet wide with 1-2 lanes — a narrower crossing.
This bridge crosses over land, not water — no water views below.
This comfort score is designed to help individuals with bridge anxiety plan their travel. All bridges in the National Bridge Inventory are regularly inspected and deemed safe for travel. This is not medical advice — if you experience severe anxiety, please consult a healthcare professional.
Year Built
1974
52 years old
Structure Type
Steel (Continuous) Box Beam (Single/Spread)
Total Length
274 ft
83.5 m
Deck Width
32 ft
9.8 m
Spans
2
sections between supports
Max Span
105 ft
longest unsupported section (32.0 m)
Traffic Lanes
2 lanes
Two-way traffic
Clearance Below
16 ft
navigation clearance under deck
Clearance height compared to familiar objects
Height shown is the navigation clearance below the bridge deck. The total height of the bridge structure (including towers and superstructure) may be higher.
Daily Traffic
10vehicles/day
39.83767°N, 89.31148°W
Steel (Continuous) Box Beam (Single)
A steel box beam bridge uses hollow rectangular steel sections that provide excellent torsional resistance and allow for longer spans.
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Data from the National Bridge Inventory (NBI), maintained by the Federal Highway Administration (FHWA).
Data year: 2025. Conditions may have changed since the last inspection.
This information is provided for educational and informational purposes only. It should not be used as the sole basis for any decisions related to bridge safety or transportation planning. Always consult official sources and local authorities for the most current data.