Pennsylvania bridge conditions
23,314 inventoried bridges · 2,813 rated poor · county by county
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 2,813 of Pennsylvania's 23,314 inventoried bridges are rated in poor condition (12.1%) in the 2025 National Bridge Inventory, as of .
- 8,019 bridges (34.4%) are rated good and 12,482 (53.5%) fair.
- The national poor rate is about 6.7%; Pennsylvania is above it (see all states ranked).
- The busiest poor-rated bridge in the state is Interstate 95 over Tacony St.and Bridge St. in Philadelphia County, carrying about 280,088 vehicles a day.
By the measure that matters most - the most traffic on a poor rating - it is Interstate 95 over Tacony St.and Bridge St. in Philadelphia County, built 1967, carrying about 280,088 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 34.4% · Fair 53.5% · Poor 12.1% of 23,314 bridges
Bridge conditions by county
Sorted by the number of poor-rated bridges. Click any county for its full bridge list.
The 25 busiest poor-rated bridges in Pennsylvania
Frequently asked questions
How many bridges in Pennsylvania are in poor condition?
2,813 of Pennsylvania's 23,314 inventoried highway bridges are rated in poor condition (12.1%) 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 Pennsylvania 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 Pennsylvania DOT.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.