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I-78 WB (lr 1045) over Pa 378 (lr 297)

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

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

I-78 WB (lr 1045) over Pa 378 (lr 297) in Northampton 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 5 (fair condition) on the 0-9 scale.
It was built in 1989 and reconstructed in 2014, making it 36 years old at the 2025 inventory.
It carries about 30,149 vehicles a day (traffic count year 2024).
Its listed owner is the state highway agency.
It is one of 212 of the 354 inventoried bridges in Northampton County rated fair (59.9%); 29 (8.2%) 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


Structure	Steel stringer or multi-beam girder
Length	about 338 ft
Location	I-78 WB over Pa. 378
NBI structure number	000000000028524
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
US 22 (lr 772) over Pa 512(LR 48046)	1954	94,431	Fair
US 22 (lr 772) over Twp.line Rd.(t-434)	1954	94,335	Fair
US 22 (lr 772) over Christian Spring Rd.	1954	94,335	Fair
US 22 (lr 772) over Norfolk Southern RR	1954	94,335	Fair
US 22 (lr 772) over Pa 191 & Monocacy CR.	1954	94,335	Fair
US 22 (lr 772) over T-575(jacksonville Road)	1954	89,021	Fair