Suffolk County, MA

494 public highway bridges

Suffolk County Bridge Snapshot

Suffolk County, Massachusetts contains 494 public highway bridges in the FHWA National Bridge Inventory. Roughly 22.7% are rated “Good,” 64.4% “Fair,” 6.9% “Poor,” and 6.9% 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 MA 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.

494

Total Bridges

22.7%

Good

6.9%

Poor

6.9%

Structurally Deficient

Condition Distribution

Good

22.7% (112)

Fair

64.4% (318)

Poor

6.9% (34)

SD

6.9% (34)

All Bridges (494)

Sort:

HWY DORCHSTR AVE

Over: COMB HAUL RD & MBTA RED

1.8 KM SW OF D ST, Suffolk, MA

Built 1917 Load: 23.1 t ADT: 34,913

HWY NORTH ROTARY

Over: ST 99 SULLIVAN SQ UNDRPS

1.6 KM N OF N WSHNGTON ST, Suffolk, MA

Built 1951 Load: 23.1 t ADT: 14,870

US 1 NE XWAY

Over: HWY MALDEN ST

.2 MI SW OF JET SR60&US1, Suffolk, MA

Built 1958 Load: 23.4 t ADT: 66,200

HWY WASHNGTON ST

Over: RR MBTA

NEAR DORCHESTER, Suffolk, MA

Built 1933 Load: 25.2 t ADT: 22,000

HWY MAFFA WAY

Over: COMB ORANGE & MBTA/BMRR

600 M NW OF SULLIVAN SQ, Suffolk, MA

Built 1952 Load: 25.3 t ADT: 19,526

I 90 RAMP D

Over: OTHER MBTA & RAMP B

EXIT 22 TOWARDS STUART ST, Suffolk, MA

Built 1981 Load: 25.9 t ADT: 9,569

I 93 NB

Over: I 93 SB/RMP LT/MIL RV

I93/US1 INTERCHANGE, Suffolk, MA

Built 2002 Load: 26.0 t ADT: 79,712

HWY RING RD

Over: I 90 & MBTA/CSX

.06 MI N OF JCT ST9, Suffolk, MA

Built 1981 Load: 26.1 t ADT: 9,600

I 93 NB B5-B10

Over: COMB MBTA & I 93 SB

.8 MI N OF RAMP I93&US1, Suffolk, MA

Built 1970 Load: 26.2 t ADT: 69,748

HWY BWKR NB OFRP

Over: HWY STRRW DR WB ON RMP

.2 MI S OF ST RTE 2A, Suffolk, MA

Built 1965 Load: 26.4 t ADT: 16,971

HWY WESTERN AVE

Over: HWY SOLDIERS FIELD RD

.32 KM N OF CAMB ST, Suffolk, MA

Built 1954 Load: 26.9 t ADT: 20,172

US 1 NB/L MYSTC L

Over: HWY CHELSEA STREET

L MYSTIC LOWER, Suffolk, MA

Built 1950 Load: 27.0 t ADT: 41,951

ST 16 EB

Over: HWY ACCESS RAMP E

3.2 KM S JCT SR60 & US1, Suffolk, MA

Built 1955 Load: 27.2 t ADT: 29,224

HWY CEDAR GROVE

Over: TR RED HSL

S. OF ADAMS ST., Suffolk, MA

Built 1935 Load: 27.4 t

HWY UP TRMNAL RD

Over: HWY LWR TERMINAL RDWY

LOGAN AIRPORT, Suffolk, MA

Built 1965 Load: 27.9 t ADT: 21,600

HWY N HARVARD ST

Over: HWY SOLDIERS FIELD RD

AT SOLDIERS FIELD ROAD, Suffolk, MA

Built 1954 Load: 28.1 t ADT: 30,388

HWY JAMAICAWAY

Over: OTHER PEAT BOG

.16 KM S OF HUNTINGTON AV, Suffolk, MA

Built 1937 Load: 28.2 t ADT: 48,750

HWY BNNINGTN ST

Over: TR BLUE LINE

OVER BLUE LINE, Suffolk, MA

Built 1961 Load: 28.4 t ADT: 17,300

I 93 SB B5-B10

Over: RR MBTA/BMRR

.9 MI N OF JCT I93&US1, Suffolk, MA

Built 1970 Load: 28.7 t ADT: 57,435

HWY MAVERICK ST

Over: OTHER PEDESTRIAN WLKWY

AT INT OF BRENAN AND MAV, Suffolk, MA

Built 1908 Load: 28.8 t ADT: 6,456

HWY SOUTH ROTARY

Over: ST 99 SULLIVAN SQ UNDRPS

1.6 KM N OF N WSHNGTON ST, Suffolk, MA

Built 1951 Load: 28.9 t ADT: 27,025

HWY NEPNST V PKY

Over: WATER NEPONSET RIVER

.16 KM E OF TRUMAN HWY, Suffolk, MA

Built 1849 Load: 29.0 t ADT: 23,300

HWY BROADWAY

Over: COMB MBTA/ST & FT PT C

0.5 KM SE JCT I93 & 190, Suffolk, MA

Built 1996 Load: 29.2 t ADT: 26,900

I 93 SB BT 38-46

Over: TR ORANGE LINE

.7 MI N OF JCT I93&US1, Suffolk, MA

Built 1970 Load: 29.5 t ADT: 87,100

I 93 SB BT 33-38

Over: TR ORANGE LINE

.6 MI N OF JCT I93&US1, Suffolk, MA

Built 1970 Load: 29.7 t ADT: 87,100

I 93 NB BT 33-38

Over: I 93 SB BT 33-38

.6 MI N OF JCT I93&US1, Suffolk, MA

Built 1970 Load: 29.8 t ADT: 81,000

ST 3 A/MORRSY BLV

Over: COMB NEPONSET AVE&RIVER

.2 MI E OF I 93, Suffolk, MA

Built 1970 Load: 29.9 t ADT: 76,500

HWY W SECOND ST

Over: COMB HAUL RD & MBTA RED

.8 KM SW D ST, Suffolk, MA

Built 1918 Load: 30.2 t ADT: 8,146

I 93 SB B10-B16

Over: RR MBTA/BMRR

1 MI N OF JCT I93&US1, Suffolk, MA

Built 1970 Load: 30.2 t ADT: 57,435

I 90 WB RAMP OFF

Over: RR MBTA

.1 MI S. CHARLES RV S111, Suffolk, MA

Built 1965 Load: 30.2 t ADT: 17,948

HWY RAMP X/XX

Over: OTHER RELIEF

MASS AVE. INT., Suffolk, MA

Built 2000 Load: 30.5 t ADT: 11,638

HWY QUINCY SHORE

Over: ST 3 A/HNCK NB&MBTA&RED

.2 MI E OF I 93, Suffolk, MA

Built 1970 Load: 30.8 t ADT: 33,000

ST 1 A/LEE BRBNK

Over: COMB ST16 & MBTA/BMRR

1000 FT SW OF JET SR60&1A, Suffolk, MA

Built 1934 Load: 31.7 t ADT: 54,957

I 93 NB BT 38-46

Over: I 93 SB BT 38-46

.7 MI N OF JCT US1&I93, Suffolk, MA

Built 1970 Load: 31.8 t ADT: 81,000

I 93 NB

Over: I 93 SB BT 61 - B5

.5 MI N OF JCT 193&US1, Suffolk, MA

Built 1970 Load: 32.2 t ADT: 37,000

HWY CURTIS ST

Over: RR CSX

.16 KM NW OF SR 1A, Suffolk, MA

Built 1906 Load: 32.3 t ADT: 12,413

HWY SARATOGA ST

Over: HWY MARTIN COUGHLIN BY

.8 KM SW OF SUFFOLK DOWNS, Suffolk, MA

Built 1906 Load: 32.3 t ADT: 12,026

HWY DANA AVE

Over: RR MBTA

1.3 KM W OF SR138/NEP.PKW, Suffolk, MA

Built 1908 Load: 32.3 t ADT: 10,600

HWY W THIRD ST

Over: COMB HAUL RD & CSX

.8 KM SW OF D ST OFFICE, Suffolk, MA

Built 1918 Load: 32.3 t ADT: 1,900

HWY N WSHNGTN ST

Over: HWY WATER ST

NEAR BOSTON GARDEN, Suffolk, MA

Built 1900 Load: 32.4 t ADT: 36,206

HWY W FOURTH ST

Over: WATER FORT POINT CHANNEL

.32 KM S I-90, Suffolk, MA

Built 1958 Load: 32.4 t ADT: 13,200

HWY BOWKER INT

Over: ST 2 COMM AV BEACON ST

.2 MI S OF ST RTE 2A, Suffolk, MA

Built 1965 Load: 32.4 t ADT: 53,577

HWY RAMP X/XX

Over: HWY ALBANY ST

ALBANY ST & FRONTAGE RD, Suffolk, MA

Built 2003 Load: 32.4 t ADT: 11,638

HWY SHIRLEY AVE

Over: TR BLUE LINE

102 FT WEST OF OCEAN AVE, Suffolk, MA

Built 1953 Load: 32.4 t ADT: 3,300

I 93 NB ON RMP

Over: I 93 SB/MBTA ORANGE LN

.8 MI N OF JCT I93&US1, Suffolk, MA

Built 1970 Load: 32.5 t ADT: 10,866

US 1 SB BTS 36/PR

Over: HWY ARLINGTON & 5TH ST

.2 MI NE OF TOBIN BR., Suffolk, MA

Built 1957 Load: 32.5 t ADT: 48,700

HWY DARTMOUTH ST

Over: TR COMM RAIL & OL

SPAN 3-5 BACK BAY STA, Suffolk, MA

Built 1961 Load: 32.7 t ADT: 8,900

HWY WILLIAMS ST

Over: COMB AMTRAK/MBTA & ORNG

BTWN ARMORY & EVERETT ST, Suffolk, MA

Built 1982 Load: 32.7 t ADT: 700

HWY MCBRIDE ST

Over: COMB AMTRAK/MBTA & ORNG

BTWN WASHINGTON & EVERETT, Suffolk, MA

Built 1982 Load: 32.7 t ADT: 3,300

I 93 NB OFF RAMP

Over: COMB RED LINE & RELIEF

2 MI S OF JCT I90&I93, Suffolk, MA

Built 1958 Load: 32.7 t ADT: 7,400

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 5, 2026