Howard County, MD

310 public highway bridges

Howard County Bridge Snapshot

Howard County, Maryland contains 310 public highway bridges in the FHWA National Bridge Inventory. Roughly 28.4% are rated “Good,” 37.1% “Fair,” 5.8% “Poor,” and 5.8% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in MD are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

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

310

Total Bridges

28.4%

Good

5.8%

Poor

5.8%

Structurally Deficient

Condition Distribution

Good

28.4% (88)

Fair

37.1% (115)

Poor

5.8% (18)

SD

5.8% (18)

All Bridges (310)

Sort:

TURF VALLEY ROAD

Over: LITTLE PATUXENT RIVER

1/4 MI N OF US 40, Howard, MD

Built 1980 Load: 99.9 t ADT: 1,000

GOVERNOR'S RUN LAN

Over: SUCKER BRANCH

1/4 MI SOUTH OF US 40, Howard, MD

Built 1980 Load: 99.9 t ADT: 150

MARTIN ROAD

Over: TRIB TO LITTLE PATUXENT

At Quarterstaff Rd, Howard, MD

Built 1972 Load: 99.9 t ADT: 500

N. LAUREL ROAD

Over: UNNAMED STREAM

1/8 M WEST OF US 1, Howard, MD

Built 1965 Load: 99.9 t ADT: 400

RESORT ROAD

Over: UNNAMED PERENNIAL STREAM

1.0 MI NORTH OF US 40, Howard, MD

Built 2019 ADT: 1,233

RESORT ROAD

Over: UNNAMED INTERMITTENT STR

0.7 MI NORTH OF US 40, Howard, MD

Built 2019 ADT: 1,233

RIVER ROAD

Over: TRIBUTARY TO PATAPSCO RI

0.6 MI E OF MD RTE 32, Howard, MD

Built 1975 Load: 21.8 t ADT: 1,160

MD 32 EB

Over: CEDAR LANE

1.19 MILE NORTH OF US 29, Howard, MD

Built 1994 Load: 29.0 t ADT: 48,582

MD 32 WB

Over: CEDAR LANE

1.19 MILE NORTH OF US 29, Howard, MD

Built 1994 Load: 29.0 t ADT: 48,582

ROVER MILL ROAD

Over: MIDDLE PATUXENT RIVER

0.6 Mile E of McEndree Rd, Howard, MD

Built 1970 Load: 32.7 t ADT: 100

TOLL HOUSE ROAD

Over: HUDSON BRANCH

30 FT S OF FREDERICK RD, Howard, MD

Built 1967 Load: 32.7 t ADT: 200

SWIMMER ROW WAY

Over: TRIB MIDDLE PATUXENT R

200 ft East of S Trotter, Howard, MD

Built 2000 Load: 32.7 t ADT: 50

HESPERUS DRIVE

Over: TRIB TO WILDE LAKE

1/4 MI SOUTH OF MD 108, Howard, MD

Built 1972 Load: 32.7 t ADT: 50

ELLICOTT WOODS LN

Over: TRIB TO BONNIE BR

At Worthington Way, Howard, MD

Built 1990 Load: 32.7 t ADT: 50

THUNDER HILL ROAD

Over: UNNAMED STREAM

1/8 MI S of MD 108, Howard, MD

Built 1972 Load: 32.7 t ADT: 200

OLD STOCKBRIDGE DR

Over: DEEP RUN

1/8 MI W of MD 103, Howard, MD

Built 1972 Load: 32.7 t ADT: 300

COLUMBIA ROAD

Over: LITTLE PATUXENT RIVER

0.5 MI N OF L. PATUX PKWY, Howard, MD

Built 1987 Load: 33.6 t ADT: 6,934

KNIGHTS BRIDGE RD

Over: HAMMONDS BRANCH

0.1 MI S LOCH LEVEN CT, Howard, MD

Built 1992 Load: 35.4 t ADT: 940

GUILFORD ROAD

Over: MIDDLE PATUXENT RIVER

0.04 MI N BERGER RD, Howard, MD

Built 1982 Load: 35.8 t ADT: 8,192

FOUNDRY STREET

Over: LITTLE PATUXENT RIVER

0.03 MI N OF GORMAN RD, Howard, MD

Built 1975 Load: 36.7 t ADT: 5,511

MD 32

Over: RIV RD,CSX,PATAPSCO RIV

ON CARROLL COUNTY LINE, Howard, MD

Built 2003 Load: 37.6 t ADT: 19,240

STEPHENS ROAD

Over: HAMMOND BRANCH

0.3 M N WHISKEY BOTTOM RD, Howard, MD

Built 2021 Load: 37.6 t ADT: 3,350

TWINSTREAM DRIVE

Over: TRIB TO BONNIE BR

75' W of Bonnie Branch Rd, Howard, MD

Built 2000 Load: 38.1 t ADT: 25

MD 732R

Over: CSX TRANS, BROCK BRIDGE

ON ANNE ARUNDEL CO LINE, Howard, MD

Built 1990 Load: 39.0 t ADT: 15,761

WHISKEY BOTTOM RD

Over: CSX RR TRACKS

ANNE ARUNDEL COUNTY LINE, Howard, MD

Built 1943 Load: 40.4 t ADT: 10,475

SANNER ROAD

Over: TRIB OF MIDDLE PATUXENT

0.3 MI S PINDELL SCHOOL, Howard, MD

Built 2003 Load: 41.7 t ADT: 2,493

MURRAY HILL ROAD

Over: MIDDLE PATUXENT RIVER

0.1 MI S VOLLMERHAUSEN RD, Howard, MD

Built 1988 Load: 42.6 t ADT: 3,576

STEVENS FOREST ROA

Over: LITTLE PATUXENT RIVER

0.1 MI E OF US 29, Howard, MD

Built 1990 Load: 42.6 t ADT: 5,350

SOUTH ENTRANCE ROA

Over: LITTLE PATUXENT RIVER

0.08 MILE WEST OF US 29, Howard, MD

Built 2004 Load: 43.1 t ADT: 4,200

CASTLEBRIDGE ROAD

Over: UNNAMED STREAM

400' N OF HOMEWOOD RD, Howard, MD

Built 1995 Load: 43.1 t ADT: 50

BROKEN LAND PKWY

Over: LITTLE PATUXENT RIVER

0.31 MI S OF US 29, Howard, MD

Built 1992 Load: 43.5 t ADT: 32,730

MD 32

Over: BR OF MIDDLE PATUXENT RI

1.5 MI N OF BURNTWOODS RD, Howard, MD

Built 2020 Load: 43.7 t ADT: 29,475

ACCESS ROAD

Over: HUDSON BRANCH

FREDERICK RD & ROGERS AVE, Howard, MD

Built 2003 Load: 44.4 t ADT: 10

MD 100

Over: SNOWDEN RIVER PARKWAY

0.86 MILE WEST OF MD 103, Howard, MD

Built 1998 Load: 45.8 t ADT: 82,092

MD 100

Over: SNOWDEN RIVER PARKWAY

0.86 MILE WEST OF MD 103, Howard, MD

Built 1997 Load: 45.8 t ADT: 82,092

ROGERS AVENUE

Over: SUCKER BRANCH

0.4 MI N OF US RTE 40, Howard, MD

Built 1988 Load: 45.8 t ADT: 9,270

BROKEN LAND PKWY

Over: LITTLE PATUXENT RIVER

0.125 MI S OF MD RTE 32, Howard, MD

Built 1986 Load: 46.7 t ADT: 21,288

Kerby Hill Rd.

Over: MD 210 Service Rd.

1.5 MILE SOUTH OF I-495, Howard, MD

Built 2021 Load: 47.6 t ADT: 6,525

MD 100

Over: EXECUTIVE PARK DRIVE

0.91 MILE WEST OF MD 104, Howard, MD

Built 1998 Load: 49.9 t ADT: 79,752

MD 100

Over: CSX RR, O'CONNOR RD

0.24 M W OF AA CO LINE, Howard, MD

Built 1996 Load: 49.9 t ADT: 83,402

MD 100

Over: CSX RR, O'CONNOR ROAD

0.24 M W OF AA CO LINE, Howard, MD

Built 1996 Load: 49.9 t ADT: 83,402

KNIGHTS BRIDGE RD

Over: HAMMONDS BRANCH

0.2 MI S OF GORMAN RD, Howard, MD

Built 1992 Load: 51.2 t ADT: 1,230

CEDAR LANE

Over: MIDDLE PATUXENT RIVER

.02 Mi N of MD 32, Howard, MD

Built 1994 Load: 52.2 t ADT: 17,121

MD 175 WBR

Over: SNOWDEN RIVER PARKWAY

0.84 MILE WEST OF MD 108, Howard, MD

Built 2001 Load: 52.6 t ADT: 32,168

HAVILAND MILL ROAD

Over: PATUXENT RIVER

1.5 MI E OF MD 650, Howard, MD

Built 1998 Load: 53.5 t ADT: 776

BETHANY LANE

Over: LITTLE PATUXENT RIVER

0.1 MI N OF US RTE 40, Howard, MD

Built 2006 Load: 54.0 t ADT: 7,980

DORSEY RUN ROAD

Over: DEEP RUN

0.5 MI SE OF US 1, Howard, MD

Built 1995 Load: 55.3 t ADT: 50

MD 175 EBR

Over: SNOWDEN RIVER PARKWAY

0.84 MILE WEST OF MD 108, Howard, MD

Built 2001 Load: 55.8 t ADT: 30,855

MARRIOTTSVILLE ROA

Over: LITTLE PATUXENT RIVER

0.23 MILE NORTH OF IS 70, Howard, MD

Built 1967 Load: 55.8 t ADT: 2,616

TRIADELPHIA ROAD

Over: MIDDLE PATUXENT RIVER

1.2 MI S OF MD RTE 144, Howard, MD

Built 1986 Load: 56.7 t ADT: 2,474

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

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026