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Maryland bridge conditions

5,500 inventoried bridges · 240 rated poor · county by county

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

240 of Maryland's 5,500 inventoried bridges are rated in poor condition (4.4%) in the 2025 National Bridge Inventory, as of August 20, 2026.
1,753 bridges (31.9%) are rated good and 3,507 (63.8%) fair.
The national poor rate is about 6.7%; Maryland is at or below it (see all states ranked).
The busiest poor-rated bridge in the state is I-83 over CSX Mta Amtrak and Nor in Baltimore city, carrying about 127,291 vehicles a day.

The worst bridge in Maryland?

By the measure that matters most - the most traffic on a poor rating - it is I-83 over CSX Mta Amtrak and Nor in Baltimore city, built 1959, carrying about 127,291 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 31.9% · Fair 63.8% · Poor 4.4% of 5,500 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 %
Baltimore city	374	34	9.1%
Montgomery County	522	25	4.8%
Baltimore County	786	22	2.8%
Prince George's County	576	18	3.1%
Garrett County	140	16	11.4%
Howard County	312	16	5.1%
Frederick County	485	14	2.9%
Allegany County	244	13	5.3%
Washington County	300	13	4.3%
Harford County	276	12	4.3%
Carroll County	205	10	4.9%
Charles County	94	8	8.5%
Caroline County	70	7	10.0%
Cecil County	193	6	3.1%
Dorchester County	47	5	10.6%
Wicomico County	98	5	5.1%
Anne Arundel County	392	4	1.0%
Somerset County	46	3	6.5%
St. Mary's County	50	2	4.0%
Kent County	44	2	4.5%
Queen Anne's County	88	2	2.3%
Worcester County	82	2	2.4%
Talbot County	42	1	2.4%
Calvert County	34	0	0.0%

The 25 busiest poor-rated bridges in Maryland

Bridge	County	Built	Vehicles/day	Condition
I-83 over CSX Mta Amtrak and Nor	Baltimore city, MD	1959	127,291	Poor
I-83 over Jones Falls (mi. 7.1 to	Baltimore city, MD	1959	105,600	Poor
Perring Pkwy Ramp over Herring Run	Baltimore city, MD	1965	75,220	Poor
Russell Street Via over Ostend Street and CSX	Baltimore city, MD	1951	70,700	Poor
Is 70 EB over US 11	Washington County, MD	1965	62,680	Poor
Is 70 WB over US 11	Washington County, MD	1965	62,680	Poor
Is 70 EB over Md 632	Washington County, MD	1966	62,680	Poor
Is 70 WB over Md 632	Washington County, MD	1966	62,680	Poor
Pulaski Highway over Herring Run	Baltimore city, MD	1921	58,858	Poor
Md 4 Wbr over Md 717	Prince George's County, MD	1959	46,652	Poor
Russell Street over CSX	Baltimore city, MD	1963	46,276	Poor
Clara Barton Parkw over Clara Barton Parkway (SB	Montgomery County, MD	1959	40,057	Poor
Is 70 Ramp A over Beaver Creek	Washington County, MD	1968	37,200	Poor
Wilkens Avenue over Gwynns Falls	Baltimore city, MD	1936	35,470	Poor
Father Hurley Boul over Little Seneca Creek Trib	Montgomery County, MD	1995	33,220	Poor
Oxon Hill Road over Broad Creek	Prince George's County, MD	1963	30,739	Poor
West Gude Drive over I-270	Montgomery County, MD	1985	30,343	Poor
I-83 over Mta Light Rail	Baltimore city, MD	1962	29,900	Poor
Hanover Street over CSX	Baltimore city, MD	1929	28,030	Poor
Broening Highway over Colgate Creek	Baltimore city, MD	1968	27,231	Poor
US 40 Orleans Str over I-83 and City Streets	Baltimore city, MD	1936	23,831	Poor
on Ramp 29TH Stree over I-83 NB	Baltimore city, MD	1959	23,318	Poor
Cherry Hill Road over Little Paint Branch	Prince George's County, MD	1966	22,938	Poor
Halfway Boulevard over Norfolk Southern Railroa	Washington County, MD	1967	21,909	Poor
US 1 over Winters Run	Harford County, MD	1963	21,112	Poor

Frequently asked questions

How many bridges in Maryland are in poor condition?

240 of Maryland's 5,500 inventoried highway bridges are rated in poor condition (4.4%) 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 Maryland 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 Maryland DOT.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.