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Md 543 over US 40 CSX Railroad

Harford County, Maryland · rated Good in the 2025 National Bridge Inventory

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

Md 543 over US 40 CSX Railroad in Harford County, Maryland, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1995, making it 30 years old at the 2025 inventory.
It carries about 17,981 vehicles a day (traffic count year 2009).
Its listed owner is the state highway agency.
It is one of 107 of the 276 inventoried bridges in Harford County rated good (38.8%); 12 (4.3%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Continuous steel girder and floorbeam
Length	about 379 ft
Location	1.17 Miles South of Md 7
NBI structure number	100000120082010
Condition class	Good

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

Bridge	Built	Vehicles/day	Condition
I-95 over Winters Run Rd Winters R	1963	161,591	Fair
I-95 over James Run	1963	130,492	Fair
I-95 over Grays Run	1963	116,162	Good
I-95 over Carsins Run	1963	100,386	Good
I-95 over Swan Creek	1963	100,386	Fair
I-95 over Md 462	1963	95,675	Fair