County profile · official public datasets

Anne Arundel County, MD

389 public highway bridges tracked in the FHWA National Bridge Inventory: 32.6% rated Good, 65.8% Fair, 1.5% Poor.

389
Public bridges
32.6%
Good condition
1.5%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Anne Arundel County pairs a top-quartile lowest Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

Top 13%
lowest Poor share in state
1.5%
Poor-condition share
389
public highway bridges
1980
avg year built

Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.

Anne Arundel County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Anne Arundel County ranks #3 of 24 Maryland counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 1.5%). Anne Arundel County, Maryland contains 389 public highway bridges. Roughly 32.6% are rated “Good,” 65.8% “Fair,” and 1.5% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

Total bridges

389

Public highway bridges in Anne Arundel County

Good condition

32.6%

127 of 389 rated 7-9

Fair condition

65.8%

256 of 389 rated 5-6

Poor condition

1.5%

6 of 389 rated 4 or below

In-state Poor-share rank

#3 of 24

Among Maryland counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 389 NBI-tracked bridges by lowest applicable component rating.

Good
32.6% (127)
Fair
65.8% (256)
Poor
1.5% (6)

Anne Arundel County's Poor-condition bridges carry 36,290 vehicle crossings a day

That is 0.3% of the county's reported daily bridge traffic on 1.5% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 6,048 crossings a day against 27,009 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.

Computed over the 389 of 389 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

37.8% of Anne Arundel County's bridges have passed the 50-year mark

147 of the 389 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 32.6% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.

Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.

One structure carries 61.6% of the county's Poor-condition bridge traffic

MD 710 over BRANCH OF BACK CREEK, built 1973, carries 22,351 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 6-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 36,290 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Anne Arundel County's bridges were built

389 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1990s, when 119 of the county's bridges still in the inventory were built, which is 30.6% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1980, 8 years newer than the Maryland average of 1972.

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

How Anne Arundel County compares with Maryland's closest counties by inventory size

The 5 Maryland counties nearest Anne Arundel County in number of bridges, with their condition splits. Its 1.5% Poor share is the 1st-lowest of these 6. Its average build year of 1980 against a peer-group mean of 1968 is 12 years newer.

Showing the 5 closest of 23 Maryland counties eligible for comparison.

Bridge inventory size and condition shares for Anne Arundel County and the 5 Maryland counties closest to it in inventory size
County Bridges Poor
Frederick County 486 2.7%
Anne Arundel County (this page) 389 1.5%
Baltimore city County 374 8.6%
Howard County 309 5.8%
Washington County 300 4.7%
Harford County 275 4.7%

Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Anne Arundel County's. Source: FHWA National Bridge Inventory, 2024 release.

Nationwide counties with similar inventory size or average build year

Two NBI-derived peer sets for Anne Arundel County, both outside Maryland so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside MD (389 bridges here).

Similar average build year

Nearest mean year-built outside MD (1980 here).

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 389 Good 127 Fair 256 Poor 6

Good-condition bridges (127)

MCNAIR ROAD

Good

Over: DORSEY CREEK

0.3 KM E OF DECATUR AVE, Anne Arundel, MD

Built 2011 Load: 73.1 t ADT: 4,400

AIRPORT EXIT ROAD

Good

Over: AIRPORT RETURN RAMP

BWI AIRPORT, Anne Arundel, MD

Built 1992 Load: 73.5 t ADT: 20,000

MD 295 SB RAMP B

Good

Over: MD 295 NBR

0.84 MI S OF HOWARD CO, Anne Arundel, MD

Built 1990 Load: 76.2 t ADT: 10,897

MD 100 EBR

Good

Over: MD 170

1.09 MILES M OF MD 100P, Anne Arundel, MD

Built 1995 Load: 76.2 t ADT: 68,782

MD 100 WBR

Good

Over: MD 170

1.09 MILES M OF MD 100P, Anne Arundel, MD

Built 1995 Load: 76.2 t ADT: 68,782

NEW CUT ROAD

Good

Over: SEVERN RUN

2.4 MILES NORTH OF MD 32, Anne Arundel, MD

Built 2001 Load: 76.2 t ADT: 10,126

IS 195

Good

Over: MD 170

1.07 MI S OF MD 295, Anne Arundel, MD

Built 1998 Load: 76.6 t ADT: 56,601

CHESTERFIELD ROAD

Good

Over: BACON RIDGE BRANCH

0.26 MI W OF HAWKINS ROAD, Anne Arundel, MD

Built 2017 Load: 78.7 t ADT: 1,276

SANDS ROAD

Good

Over: WILSON OWENS BRANCH

1 MI N OF MD 408, Anne Arundel, MD

Built 2016 Load: 81.6 t ADT: 2,393

HONEYLOCUST DRIVE

Good

Over: TOWSERS BRANCH

0.25 MI W OF MD 3, Anne Arundel, MD

Built 2018 Load: 85.9 t ADT: 1,128

MD 10 SBR

Good

Over: MARLEY CREEK

0.45 MI S OF MD 648E, Anne Arundel, MD

Built 1988 Load: 86.6 t ADT: 43,170

WINTERSON ROAD

Good

Over: MD 295 SBR

0.41 MI N OF IS 195, Anne Arundel, MD

Built 1990 Load: 87.5 t ADT: 7,530

HARWOOD ROAD

Good

Over: STOCKETTS RUN

2.0 MI WEST OF MD ROUTE 2, Anne Arundel, MD

Built 2023 Load: 87.8 t ADT: 708

RESERVE BOULEVARD

Good

Over: UNNAMED TRIBUTARY TO LIT

.03 MI S OF MD198, Anne Arundel, MD

Built 2019 Load: 97.2 t ADT: 194

MD 450

Good

Over: NORTH RIVER

2.89 MILE EAST OF MD 424, Anne Arundel, MD

Built 1989 Load: 99.9 t ADT: 6,927

MD 258

Good

Over: TRACYS CREEK

1.07 MILE EAST OF MD 2, Anne Arundel, MD

Built 1963 Load: 99.9 t ADT: 8,882

IS 97

Good

Over: BR OF BACON RIDGE BRANCH

1.68 MILES N OF MD 450, Anne Arundel, MD

Built 1987 Load: 99.9 t ADT: 91,300

IS 595 RAMP CC/3

Good

Over: IS 97 SBR

0.17 MI N OF IS 595, Anne Arundel, MD

Built 1994 Load: 99.9 t ADT: 5,423

MD 32 WBR

Good

Over: AMTRAK

0.41 MILE WEST OF MD 170, Anne Arundel, MD

Built 1991 Load: 99.9 t ADT: 53,532

MD 295 RAMP C

Good

Over: BR OF LITTLE PATUXENT RI

MD32 & CANINE RD, Anne Arundel, MD

Built 1991 Load: 99.9 t ADT: 1,440

MD 32

Good

Over: ROGUE HABOR BRANCH

0.91 M N OF PEPPER ROAD, Anne Arundel, MD

Built 1990 Load: 99.9 t ADT: 50,192

MD 198

Good

Over: TRIB TO LITTLE PATUXENT

0.793 MILE WEST OF MD 32, Anne Arundel, MD

Built 2002 Load: 99.9 t ADT: 24,452

ARUNDEL MILLS BOUL

Good

Over: PINEY RUN

0.4 MI SE OF MD 295, Anne Arundel, MD

Built 2001 Load: 99.9 t ADT: 25,990

STARWOOD DRIVE

Good

Over: MARLEY CREEK

0.6 MI S OF MD100, Anne Arundel, MD

Built 1971 Load: 99.9 t ADT: 652

CROSSROADS DRIVE

Good

Over: TRIB TO SEVERN RUN

625 FT EAST OF MD 170, Anne Arundel, MD

Built 1994 Load: 99.9 t ADT: 1,891

WAUGH CHAPEL ROAD

Good

Over: TOWSERS BRANCH

0.25 MI WEST OF MD 3, Anne Arundel, MD

Built 1972 Load: 99.9 t ADT: 18,893

Strawberry Lake Wa

Good

Over: Tributary to Little Patu

0.6 MI S. of MD 170, Anne Arundel, MD

Built 1999 Load: 99.9 t ADT: 6,700

Read our methodology - how this data is sourced, computed, and verified.

Related

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.