Madison County Bridge Report Card
Madison County scores 78 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Madison County, Illinois
Madison County has 524 bridges in the National Bridge Inventory, with 46 rated poor and 0 rated scour-critical. Its poor-condition share of 8.8% is at or below the 9.5% statewide average. Poor-condition bridges carry about 224,575 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Madison County a Bridge Condition Exposure Score of 78/100 (C). The county has 524 bridges in the National Bridge Inventory, including 46 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 224,575 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.
How the Score Breaks Down
| Factor | Weight | County Value | Penalty |
|---|---|---|---|
| Poor-condition bridge share | 40 | 8.8% | 17.6 |
| Poor-condition traffic exposure | 25 | 5.4% of measured traffic | 4.0 |
| Scour-critical bridge share | 20 | 0.0% | 0.0 |
| Average age vs national baseline | 10 | 46 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 4,192,465 measured daily crossings | 0.0 |
Score = 100 minus weighted penalties. The score is a comparative research signal, not an official safety rating. Read the full methodology.
County Comparisons
| County Poor-Condition Share | 8.8% |
| State Poor-Condition Share | 9.5% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 0.0% |
| Average Bridge Age | 46 years |
| Poor-Condition Traffic Exposure | 224,575 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Madison County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Fai 270 EB over County Ditch | Poor condition + traffic exposure | Poor | 24,900 | 1963 |
| Fai 270 WB over County Ditch | Poor condition + traffic exposure | Poor | 24,900 | 1963 |
| I-255 SB over 162 Abandon Uprr 2 Trail | Poor condition + traffic exposure | Poor | 20,250 | 1987 |
| Fai 255 NB over Horseshoe Lake Road | Poor condition + traffic exposure | Poor | 20,150 | 1987 |
| Fai 255 SB over Horseshoe Lake Road | Poor condition + traffic exposure | Poor | 20,150 | 1987 |
| I-255 NB over 162 Abandon Uprr 2 Trail | Poor condition + traffic exposure | Poor | 20,150 | 1987 |
| Il 111/3-homer Ada over Rogers Av & Bloomer | Poor condition + traffic exposure | Poor | 17,200 | 1958 |
| Cntr Grove/ Fau 88 over Mct Bike Trail | Poor condition + traffic exposure | Poor | 12,600 | 1989 |
| Il 157 / Il 162 over Judys Branch Creek | Poor condition + traffic exposure | Poor | 10,600 | 1933 |
| Il 140 over Trib To Indian Creek | Poor condition + traffic exposure | Poor | 8,050 | 1927 |
Important safety note
Poor condition does not mean a bridge is unsafe. It means at least one major component has significant deterioration and the bridge is a priority for maintenance, repair, or replacement. Bridges judged unsafe are closed or restricted by transportation agencies.