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:

ROGERS AVE

Over: IS 70

0.76 MILE EAST OF US 29, Howard, MD

Built 1966 ADT: 94,221

US 29 NBR

Over: US 29 RAMP 'A' (07)

0.28 MI S OF US 40, Howard, MD

Built 1966 ADT: 15,892

US 29 NBR

Over: FREDERICK ROAD

0.55 MI S OF US 40, Howard, MD

Built 1948 ADT: 10,355

US 29 SBR

Over: FREDERICK ROAD

0.55 MI S OF US 40, Howard, MD

Built 1966 ADT: 10,355

US 29 NBR

Over: US 40

0.28 M W OF RIDGE ROAD, Howard, MD

Built 1966 ADT: 54,680

US 29 SBR

Over: US 40

0.28 M W OF RIDGE ROAD, Howard, MD

Built 1966 ADT: 54,680

RIDGE ROAD

Over: US 29 RAMP 'H' (4)

@ US 29, Howard, MD

Built 1966 ADT: 4,356

IS 70 EBR

Over: IS 70 RAMP 'G'(7)

0.23 MILE EAST OF US 29, Howard, MD

Built 1966 ADT: 30,502

US 29 NBR

Over: IS 70 RAMP 'G'(7)

0.67 MI S OF MD 99, Howard, MD

Built 1966 ADT: 30,502

IS 70 EBR

Over: MD 97

.45 MILE NORTH OF MD 144A, Howard, MD

Built 1973 ADT: 13,020

IS 70 WBR

Over: MD 97

.45 MILE NORTH OF MD 144A, Howard, MD

Built 1973 ADT: 13,020

IS 70 EBR

Over: MD 32

0.82 MILE SOUTH OF MD 99, Howard, MD

Built 1973 ADT: 23,832

IS 70 WBR

Over: MD 32

0.82 MILE SOUTH OF MD 99, Howard, MD

Built 1973 ADT: 23,832

US 40 SB RAMP

Over: US 40 EBR

0.13 MILE EAST OF US 29, Howard, MD

Built 2012 ADT: 54,680

US 40

Over: PATAPSCO FOREST ROAD

0.52 MI W OF BALTIMORE CO, Howard, MD

ST JOHNS LANE

Over: IS 70

0.8 MI W OF US 29, Howard, MD

Built 1966 ADT: 83,620

TRIDELPHIA ROAD

Over: MD 32

0.36 M S OF TEN OAKS ROAD, Howard, MD

Built 1961 ADT: 28,072

US 29 NBR

Over: IS 70

0.23 M W OF BR NO 1302000, Howard, MD

Built 1966 ADT: 95,957

US 29 SBR

Over: IS 70

0.44 MI S OF MD 99, Howard, MD

Built 1966 ADT: 95,957

MD 100 EBR

Over: IS 95

0.5 MILE NORTH OF MD 103, Howard, MD

Built 1970 ADT: 192,100

MD 100 WBR

Over: IS 95

0.5 MILE NORTH OF MD 103, Howard, MD

Built 1970 ADT: 192,100

IS 95 NB

Over: MD 103

0.71 MILE NORTH OF US I, Howard, MD

Built 1968 ADT: 8,201

IS 95 SB

Over: MD 103

0.71 MILE NORTH OF US I, Howard, MD

Built 1968 ADT: 8,201

MONTGOMERY ROAD

Over: IS 95

1.07 MILE SOUTH OF IS 895, Howard, MD

Built 1969 ADT: 192,100

BETHANY LANE

Over: IS 70

1.61 MILE WEST OF US 29, Howard, MD

Built 1968 ADT: 83,620

MARRIOTTSVILLE RD

Over: IS 70

0.82 MILE EAST OF US 40, Howard, MD

Built 1968 ADT: 83,620

US 40 WBR

Over: IS 70

US 40 @ IS 70, Howard, MD

Built 1968 ADT: 62,680

MD 100 RAMP 'A'

Over: IS 95

0.16 MILE NORTH OF MD 100, Howard, MD

Built 1970 ADT: 192,100

MD 100 EBR

Over: MD 100 RAMP 'A'

0.92 MILE WEST OF US 1, Howard, MD

Built 1970 ADT: 15,864

MD 100 WBR

Over: MD 100 RAMP 'A'

0.92 MILE WEST OF US 1, Howard, MD

Built 1970 ADT: 15,864

MD 175 EB

Over: IS 95

1.38 M S OF MD 103, Howard, MD

Built 1970 ADT: 197,902

MD 175 WB

Over: IS 95

1.28 M S OF MD 103, Howard, MD

Built 1970 ADT: 197,902

MD 32 RAMP 'B'(2)

Over: GUILDFORD ROAD

1.30 MILES N OF IS 95I, Howard, MD

Built 1970 ADT: 15,711

IS 95 NBR

Over: GUILDFORD ROAD

1.30 MILES N OF IS 95, Howard, MD

Built 1970 ADT: 15,711

GUILFORD ROAD

Over: IS 95 SBR

1.74 MILES N OF US 1, Howard, MD

Built 1970 ADT: 187,920

IS 95 NBR

Over: MD 32 WBR

0.68 M N/VOLLMERHAUSEN RD, Howard, MD

Built 1970 ADT: 91,311

MD 32 WBR

Over: IS 95 SBR

0.14 M S OF GUILFORD ROAD, Howard, MD

Built 1970 ADT: 187,920

IS 95 NBR

Over: MD 32 EBR

1.74 MILES NORTH OF US 1, Howard, MD

Built 1970 ADT: 91,311

MD 32 EBR

Over: IS 95 SBR

0.14 MILE SOUTH OF MD 32, Howard, MD

Built 1970 ADT: 187,920

VOLLMERHAUSEN RD

Over: IS 95 SBR

0.71 MILE SOUTH OF MD 32, Howard, MD

Built 1970 ADT: 186,750

GORMAN ROAD

Over: IS 95

0.96 MILE NORTH OF MD 216, Howard, MD

Built 1970 ADT: 186,750

MD 216 EBR

Over: IS 95

1.16 MILES N OF PG CO, Howard, MD

Built 1970 ADT: 186,750

MD 216 WBR

Over: IS 95

1.16 MILES N OF PG CO, Howard, MD

Built 1970 ADT: 186,750

VOLLMERHAUSEN ROAD

Over: MD32

0.9 MILE NORTH OF US 1, Howard, MD

Built 1971 ADT: 80,612

SAND HILL ROAD

Over: IS 70

1.19 MILE EAST OF MD 32, Howard, MD

Built 1973 ADT: 85,270

MORGAN STATION RD

Over: IS 70

1.9 MILE WEST OF MD 97, Howard, MD

Built 1973 ADT: 71,700

WATERSVILLE ROAD

Over: IS 70

2.54 M E OF CARROLL CO/L, Howard, MD

Built 1973 ADT: 65,550

W WATERSVILLE ROAD

Over: IS 70

1.01 M E OF CARROLL CO/L, Howard, MD

Built 1973 ADT: 65,550

MD 175 EBR

Over: US 29

1.11 M S OF MD 108, Howard, MD

Built 1974 ADT: 84,163

MD 175 WBR

Over: US 29

1.11 M S OF MD 108, Howard, MD

Built 1974 ADT: 84,163

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