Connecticut bridge conditions
4,363 inventoried bridges · 209 rated poor · county by county
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 209 of Connecticut's 4,363 inventoried bridges are rated in poor condition (4.8%) in the 2025 National Bridge Inventory, as of .
- 1,210 bridges (27.7%) are rated good and 2,944 (67.5%) fair.
- The national poor rate is about 6.7%; Connecticut is at or below it (see all states ranked).
- The busiest poor-rated bridge in the state is Interstate-95 over Mill Plain Road in Fairfield County, carrying about 130,300 vehicles a day.
By the measure that matters most - the most traffic on a poor rating - it is Interstate-95 over Mill Plain Road in Fairfield County, built 1958, carrying about 130,300 vehicles a day. That is a repair-priority flag, not a collapse warning: what a poor rating does and does not mean. See the worst bridge in every state.
Good 27.7% · Fair 67.5% · Poor 4.8% of 4,363 bridges
Bridge conditions by county
Sorted by the number of poor-rated bridges. Click any county for its full bridge list.
| County | Bridges | Rated poor | Poor % |
|---|---|---|---|
| Litchfield County | 470 | 35 | 7.4% |
| Fairfield County | 862 | 33 | 3.8% |
| New Haven County | 893 | 33 | 3.7% |
| Hartford County | 916 | 32 | 3.5% |
| Windham County | 264 | 23 | 8.7% |
| New London County | 442 | 23 | 5.2% |
| Tolland County | 207 | 17 | 8.2% |
| Middlesex County | 309 | 13 | 4.2% |
The 25 busiest poor-rated bridges in Connecticut
Frequently asked questions
How many bridges in Connecticut are in poor condition?
209 of Connecticut's 4,363 inventoried highway bridges are rated in poor condition (4.8%) in the 2025 National Bridge Inventory. 'Poor' is FHWA's classification for a bridge whose deck, superstructure, or substructure is rated 4 or lower on the 0-9 scale; it was formerly called 'structurally deficient'.
Are the poor-rated bridges in Connecticut safe to drive on?
A poor rating flags advanced deterioration that needs repair or close monitoring; it does not by itself mean a bridge is unsafe. Bridges judged unsafe are closed or restricted to lighter loads by the owner. Inspections continue on all open bridges, generally at least every 24 months under the National Bridge Inspection Standards.
Source: FHWA National Bridge Inventory, 2025 vintage, reported by the Connecticut DOT.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.