Montgomery County, MD

522 public highway bridges

Montgomery County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Montgomery County, Maryland contains 522 public highway bridges. Roughly 33% are rated “Good,” 46.7% “Fair,” and 4.6% “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.

522

Total Bridges

33%

Good

46.7%

Fair

4.6%

Poor Condition

Condition Distribution

Good

33% (172)

Fair

46.7% (244)

Poor

4.6% (24)

All Bridges (522)

Sort:

MD 650 RAMP 'F'

Over: IS 495

0.10 MI W OF PG CO LINE, Montgomery, MD

Built 1964 ADT: 243,712

IS 495 SE RAMP

Over: CLARA BARTON PKWY

0.39 MI E OF VA LINE, Montgomery, MD

Built 1963 ADT: 13,090

IS 495 NW RAMP

Over: MACARTHUR BOULEVARD

0.58 MI E OF VA LINE, Montgomery, MD

Built 1963 ADT: 12,002

IS 270 SBR

Over: IS 495 OL

0.15 MILE WEST OF IS 270, Montgomery, MD

Built 1990 ADT: 115,750

SHADY GROVE ROAD

Over: IS 370

0.48 m e of br no 1515000, Montgomery, MD

Built 1989 ADT: 78,741

IS 370 EBR

Over: IS 370 RAMP 'J'

0.22 MILE EAST OF MD 355, Montgomery, MD

Built 1988 ADT: 6,228

IS 370

Over: MD 355

.06 M N OF SHADY GROVE RD, Montgomery, MD

Built 1989 ADT: 34,970

INDUSTRIAL DRIVE

Over: IS 370

0.5 MI E OF IS 270, Montgomery, MD

Built 1990 ADT: 78,741

IS 370 RAMP'F'

Over: IS 370

0.16 MILE EAST OF IS 270, Montgomery, MD

Built 1990 ADT: 78,741

IS 270

Over: IS 370

1.2 MILES WEST OF MD 355, Montgomery, MD

Built 1990 ADT: 78,741

IS 270 RAMP 'C'(5)

Over: IS 370 RAMP 'B'

1.24 MILES WEST OD MD 355, Montgomery, MD

Built 1990 ADT: 18,057

IS 270 RAMP 'C'(5)

Over: IS 270 RAMP 'F'(1)

0.21 MILE SOUTH OF IS 370, Montgomery, MD

Built 1990 ADT: 13,596

IS 370 RAMP 'F'(1)

Over: IS 270

0.08 MILE NORTH OF IS 370, Montgomery, MD

Built 1990 ADT: 216,270

IS 370 EBR

Over: IS 370 RAMP 'B'

0.07 MILE WEST OF IS 270, Montgomery, MD

Built 1990 ADT: 18,057

IS 270 RAMP 'A'(6)

Over: IS 495 OL

0.78 MILE EAST OF MD 187, Montgomery, MD

Built 1990 ADT: 115,750

ROCKLEDGE BL'VD

Over: IS 270

0.29 MILE NORTH OF MD 187, Montgomery, MD

Built 2002 ADT: 130,450

MD 927 & RAMP 'D'

Over: IS 270 RAMP 'I'

0.13 MILE EAST OF IS 270, Montgomery, MD

Built 1988 ADT: 1,487

IS 270 RAMP A 1

Over: IS 270Y

0.87 M N/DEMOCRACY BL'VD, Montgomery, MD

Built 1995 ADT: 132,561

DEER RIDGE ROAD

Over: MD 119

0.27 M S OF BR NO 1517400, Montgomery, MD

Built 1989 ADT: 20,731

MA 929A & MD 929B

Over: US 29

0.47 M N OF TECH ROAD, Montgomery, MD

Built 2006 ADT: 54,750

MD 929A

Over: US FUTURE RAMP E

0.033 MILE WEST OF US 29, Montgomery, MD

Built 2006 ADT: 3,385

US 29 NBR

Over: MD 198

1.29 M W OF PG CO LINE, Montgomery, MD

Built 2002 ADT: 41,221

US 29 SBR

Over: MD 198

1.29 M W OF PG CO LINE, Montgomery, MD

Built 2002 ADT: 41,221

DUSTIN ROAD

Over: US 29

.78 M S OF HOWARD CO LINE, Montgomery, MD

Built 2003 ADT: 49,203

BRIGGS CHANEY ROAD

Over: US 29

2.26 MILES S OF MD 198, Montgomery, MD

Built 2007 ADT: 51,532

WESTLAKE TERRACE-F

Over: I-270

1 MI N OF DEMOCRACY BLVD, Montgomery, MD

Built 1994 ADT: 133,092

FATHER HURLEY BOUL

Over: I-270

0.5MI E. OF CRYSTAL RK DR, Montgomery, MD

Built 1995 ADT: 97,601

FATHER HURLEY BOUL

Over: I-270

0.5MI E. OF CRYSTAL RK DR, Montgomery, MD

Built 1995 ADT: 97,601

BETHESDA TROLLEY T

Over: I-495

4.96 MI WEST OF I-270, Montgomery, MD

Built 2003 ADT: 112,619

BETHESDA TROLLEY T

Over: EAST SPUR OF I-270

.695 MI NORTH OF I-495, Montgomery, MD

Built 2003 ADT: 112,111

GUDE DRIVE WEST

Over: I-270

.35 MI EAST OF MD 28, Montgomery, MD

Built 1985 ADT: 240,421

WOOTTON PARKWAY

Over: I-270

0.2 MI. E. SEVEN LOCKS RD, Montgomery, MD

Built 1990 ADT: 263,331

MACARTHUR BLVD.

Over: CABIN JOHN CREEK

1.5 MI. E. OF I-495, Montgomery, MD

Built 1863 Load: 11.7 t ADT: 6,000

GLEN ROAD

Over: KILGOUR BRANCH

1.5 MI WEST OF MD 189, Montgomery, MD

Built 1942 Load: 13.6 t ADT: 5,880

GRIFFITH ROAD

Over: HAWLINGS RIVER

1 MI W OF JCT SR 650, Montgomery, MD

Built 1920 Load: 17.2 t ADT: 282

East Montgomery Ro

Over: Rockville Center Multipl

0.5 Miles West of Md. 355, Montgomery, MD

Built 1998 Load: 18.1 t ADT: 500

MD 28

Over: BR OF DRY SENECA CREEK

0.98 MILE WEST OF MD 117, Montgomery, MD

Built 1954 Load: 19.0 t ADT: 5,420

CARDEROCK ACCESS C

Over: CLARA BARTON PARKWAY

0.7 MILES WEST OF MACARTH, Montgomery, MD

Built 1962 Load: 19.0 t ADT: 2,000

SOUTH PALMER ROAD

Over: PARKING GARAGE

1 KM W OF RT. 185, Montgomery, MD

Built 1980 Load: 19.3 t ADT: 200

CLARA BARTON PARKW

Over: CABIN JOHN CREEK & CABIN

1.6 MILES SOUTH OF I-495., Montgomery, MD

Built 1963 Load: 20.0 t ADT: 16,120

STOKES ROAD

Over: STONEY CREEK

50M EAST OF E PALMER RD, Montgomery, MD

Built 1950 Load: 20.8 t ADT: 2,000

FALSTONE AVENUE

Over: LITTLE FALLS BRANCH

0.1 MI E OF WARWICK AVE, Montgomery, MD

Built 1965 Load: 20.9 t ADT: 50

PARKLAWN ENTRANCE

Over: ROCK CREEK

RT 28 SOUTH OF ROCKVILLE, Montgomery, MD

Built 1950 Load: 22.7 t ADT: 27

EDWARDS FERRY ROAD

Over: BROAD RUN

1 MI N OF WESTERLY ROAD, Montgomery, MD

Built 1982 Load: 24.0 t ADT: 312

EAST DEER PARK DRI

Over: CSXT RAILROAD

0.6 MILES EAST OF MD 355, Montgomery, MD

Built 1945 Load: 24.9 t ADT: 7,121

RIVER ROAD

Over: BROAD RUN

0.3 MI E OF ELMER SCHOOL, Montgomery, MD

Built 1911 Load: 25.4 t ADT: 444

US 29

Over: SLIGO CREEK

0.14 M S OF FRANKLIN AVE, Montgomery, MD

Built 1936 Load: 26.3 t ADT: 55,302

MD 396

Over: LITTLE FALLS BRANCH

0.69 MILE WEST OF WASH DC, Montgomery, MD

Built 1931 Load: 26.3 t ADT: 15,581

MD 97

Over: REDDY BRANCH

2.89 MILES S OF MD 650, Montgomery, MD

Built 1927 Load: 27.7 t ADT: 10,740

GAME PRESERVE ROAD

Over: WHETSTONE RUN

0.2 MI NORTH OF MD 355, Montgomery, MD

Built 1990 Load: 27.7 t ADT: 2,086

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

Related

Browse all → | Rankings →

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

P

Compiled by PlainBridges, Independent data publisher

Every figure on PlainBridge 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.