Analyzing deck conditions, superstructure ratings, and bad puns...
Analyzing deck conditions, superstructure ratings, and bad puns...
Infrastructure Grade
Infrastructure Report Card
11.0% of bridges in poor condition
Total Bridges
11,397
Poor Condition
1,250(11.0%)
Avg Bridge Age
49 yrs
Trend
Stable
| Metric | Michigan | National Avg | Trend |
|---|---|---|---|
| % Poor Condition | 11.0% | 6.7% | Stable |
| vs. National Average | +4.3 pts | -- | -- |
| Average Bridge Age | 49 yrs | 48 yrs | -- |
| Good or Better | 4,510(39.6%) | -- | -- |
Grade Scale
Percentage of bridges in poor condition over time. The dashed line shows the national average for comparison.
Total Bridges
11,397
Poor Condition
1,250(11.0%)
Average Age
49 yrs
Daily Crossings
95.1M
Good or Better
4,510(39.6%)
These bridges have at least one major component rated "5" (Fair) — one step above the poor threshold. Sorted by daily traffic to highlight highest-impact structures at risk.
| Bridge | Location | Deck | Super | Sub | Daily Traffic |
|---|---|---|---|---|---|
| I-96 WB | Oakland County | 5 | 7 | 7 | 182,700 |
| I-94 | Wayne County | 6 | 6 | 5 | 180,032 |
| I-75 | Wayne County | 8 | 5 | 8 | 152,325 |
| I-75 & RAMPS C&D | Wayne County | 5 | 6 | 7 | 152,325 |
| HUBBELL AVE | Wayne County | 5 | 7 | 6 | 143,000 |
| I-696 | Oakland County | 6 | 5 | 7 | 122,300 |
| I-96 | Oakland County | 6 | 5 | 6 | 116,050 |
| I-75 | Wayne County | 7 | 6 | 5 | 103,925 |
| I-75 NB OFF RAMP | Wayne County | 7 | 5 | 6 | 103,925 |
| I-94 | Washtenaw County | 6 | 5 | 5 | 102,776 |
| I-94 | Macomb County | 7 | 7 | 5 | 101,088 |
| I-94 | Macomb County | 7 | 5 | 5 | 99,698 |
| I-94 | Macomb County | 6 | 8 | 5 | 99,300 |
| I-94 | Macomb County | 6 | 5 | 5 | 99,300 |
| M-10 SB NWESTERN | Oakland County | 5 | 5 | 7 | 98,076 |
The 10 bridges in poorest condition, ranked by lowest sufficiency rating.
over BETSIE RIVER
over BIG BEAR CREEK
over SALINE RIVER
over NORTH MACON CREEK
over N BR PENTWATER RIVER
over LITTLE TROUT RIVER
over CISCO BR ONTONAGON RIVER
over PORTAGE RIVER
over S BR MACATAWA RIVER
over BIG POTATO CREEK
States with similar infrastructure profiles, ranked by percentage of bridges in poor condition.
Grading: Grades are based on the percentage of bridges classified as "poor condition." A bridge is in poor condition when at least one major component (deck, superstructure, or substructure) is rated 4 or below on the NBI 0-9 scale.
Data Source: Federal Highway Administration (FHWA) National Bridge Inventory (NBI). Data is updated annually. BridgeStats is not affiliated with or endorsed by the FHWA.
Watchlist Criteria: Bridges with any component rated "5" (Fair) are one step from the poor threshold of 4 and are flagged for monitoring. These bridges are not yet in poor condition but may deteriorate without maintenance.