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18th Street over Penn Ctr Undrgrnd St Sys

Philadelphia County, Pennsylvania · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

18th Street over Penn Ctr Undrgrnd St Sys in Philadelphia County, Pennsylvania, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1957, making it 68 years old at the 2025 inventory.
It carries about 11,000 vehicles a day (traffic count year 1985).
Its listed owner is a city or municipal highway agency.
It is one of 369 of the 587 inventoried bridges in Philadelphia County rated fair (62.9%); 74 (12.6%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings

Component	Rating (2025)	FHWA scale meaning
Superstructure	6	Satisfactory condition
Substructure	6	Satisfactory condition

Source: FHWA National Bridge Inventory, 2025 data as reported by the Pennsylvania department of transportation.

Bridge	Built	Vehicles/day	Condition
Interstate 95 over Orthodox-pearce Street	1966	280,088	Fair
Interstate 95 over Margaret Str.and Conrail	1966	280,088	Fair
Interstate 95 over Tacony St.and Bridge St.	1967	280,088	Poor
Interstate 95 over Fraley Street	1967	280,088	Poor
Interstate 95 over Levick Street	1964	280,088	Fair
I-95; Ramp F & B over New State Road	2016	280,088	Good