Suffolk County, MA

494 public highway bridges

Suffolk County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Suffolk County, Massachusetts contains 494 public highway bridges. Roughly 22.7% are rated “Good,” 64.4% “Fair,” and 6.9% “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.

494
Total Bridges
22.7%
Good
64.4%
Fair
6.9%
Poor Condition

Condition Distribution

Good
22.7% (112)
Fair
64.4% (318)
Poor
6.9% (34)

All Bridges (494)

HWY SO STA CONN

Good

Over: I 93 RAMPS CC KK D

UNIT 1, Suffolk, MA

Built 2004 Load: 20.8 t ADT: 350

I 93 RMPS X XE

Good

Over: RR AMTRAK/MBTA

I93&I90 INT .4K SW P.O., Suffolk, MA

Built 2005 Load: 23.4 t ADT: 2,316

HWY SO STA CONN

Good

Over: HWY FRONTAGE RD

SOUTH STATION, Suffolk, MA

Built 1995 Load: 24.0 t

I 93 RAMP N-S

Good

Over: COMB NASHUA ST&MGH PKNG

LEVERETT CIRCLE, BOSTON, Suffolk, MA

Built 1999 Load: 25.5 t ADT: 34,304

HWY BEACH ST

Good

Over: TR BLUE LINE

AT INTERSECT KIMBALL AVE, Suffolk, MA

Built 1938 Load: 28.0 t ADT: 8,900

I 90 RAMP F

Good

Over: I 93 RMP KK &INFLD ACCS

.07K W OF I93NB@S.ST CON, Suffolk, MA

Built 2004 Load: 30.1 t ADT: 7,600

HWY DARTMOUTH ST

Good

Over: RR AMTRAK/MBTA

.16 KM S OF I90/COPLY PL., Suffolk, MA

Built 1983 Load: 32.4 t ADT: 27,310

HWY HARVARD ST

Good

Over: RR MBTA

.33 MI W OF SR28, Suffolk, MA

Built 1904 Load: 32.4 t ADT: 12,200

HWY FREIGHT COR

Good

Over: WATER RESERVE CHANNEL

MPA FREIGHT OFF SUMMER ST, Suffolk, MA

Built 2017 Load: 32.4 t ADT: 597

HWY S BOS BYPASS

Good

Over: COMB AMTRAK/MBTA&RED LN

.6 MI S OF JCT I 90, I 93, Suffolk, MA

Built 1995 Load: 32.4 t ADT: 10,776

ST145 REV BCH PKWY

Good

Over: RR MBTA/BMRR

.1 MI E OF ST 1A, Suffolk, MA

Built 1899 Load: 32.4 t ADT: 51,500

HWY RESERVATN RD

Good

Over: WATER MOTHER BROOK

.48 KM NW HYDE PARK AVE, Suffolk, MA

Built 1898 Load: 32.6 t ADT: 6,853

I 93 NB

Good

Over: OTHER RELIEF

ALBANY ST / FRONTAGE RD, Suffolk, MA

Built 2002 Load: 32.9 t ADT: 80,156

HWY N WSHNGTN ST

Good

Over: OTHER WAREHOUSE

NEAR BOSTON GARDEN, Suffolk, MA

Built 1900 Load: 33.0 t ADT: 36,206

I 93 RAMP AS

Good

Over: OTHER RELIEF

0.65 KM SOUTH OF I-90, Suffolk, MA

Built 2003 Load: 34.4 t ADT: 22,241

HWY SUMMER ST

Good

Over: HWY C ST

0.16 KM SW OF TWT, Suffolk, MA

Built 2000 Load: 34.4 t ADT: 20,043

HWY SUMMER ST

Good

Over: COMB I90 RPS& HAUL &CSX

AT CONVENTION CENTER, Suffolk, MA

Built 2002 Load: 34.5 t ADT: 22,241

HWY SO STA CONN

Good

Over: I 93 RAMPS CC KK D

UNIT 2, Suffolk, MA

Built 2004 Load: 35.1 t

HWY CHELSEA ST

Good

Over: WATER CHELSEA RIVER

AT CHELSEA RIVER, Suffolk, MA

Built 2012 Load: 35.2 t ADT: 13,400

I 93 RAMP SN

Good

Over: COMB MBTA & ORANGE LINE

I93 US1 INTERCHANGE, Suffolk, MA

Built 1999 Load: 35.7 t ADT: 11,575

HWY BELLNGHM ST

Good

Over: RR MBTA SILVER LINE

2.4 KM S OF JCT US1&SR16, Suffolk, MA

Built 1993 Load: 35.8 t ADT: 3,600

HWY CUMMINS HWY

Good

Over: RR AMTRAK/MBTA

JUST W OF HYDE PARK AVE, Suffolk, MA

Built 1921 Load: 36.1 t ADT: 6,500

HWY D ST

Good

Over: COMB HAUL RD & CSX

AT HAUL ROAD, Suffolk, MA

Built 2005 Load: 36.2 t ADT: 27,300

I 90 RAMP D

Good

Over: OTHER RELIEF

I 90 EXIT 22, Suffolk, MA

Built 1981 Load: 36.9 t ADT: 9,569

I 93 RAMP LC-N

Good

Over: I 93 RAMP S-N BOAT

UNIT 1, Suffolk, MA

Built 2003 Load: 37.5 t ADT: 12,400

HWY VIADUCT ST

Good

Over: COMB CNGRSS&HAUL RD&CSX

AT WORLD TRADE CENTER, Suffolk, MA

Built 2002 Load: 37.7 t ADT: 700

HWY DANA AVE

Good

Over: WATER NEPONSET RIVER

AT NEPONSET RIVER, Suffolk, MA

Built 1908 Load: 37.8 t ADT: 11,900

HWY SUMMER ST

Good

Over: HWY W SERVICE RD EXT

AT CONVENTION CENTER, Suffolk, MA

Built 2003 Load: 37.8 t ADT: 14,224

HWY RAMP L

Good

Over: HWY RAMP FL

MASS AVE. INT., Suffolk, MA

Built 2002 Load: 39.6 t ADT: 22,241

HWY SO STA CONN

Good

Over: COMB MBTA & RELIEF

SOUTH STATION, Suffolk, MA

Built 1995 Load: 39.9 t

US 1 RP ABUT-BT50

Good

Over: HWY ARLINGTON ST

1.3 KM NE OF TOBIN BR., Suffolk, MA

Built 1957 Load: 39.9 t ADT: 850

HWY RAMP K/L

Good

Over: OTHER RELIEF

MASS AVE. INT., Suffolk, MA

Built 2002 Load: 40.2 t ADT: 44,224

I 93 NB

Good

Over: I 93 SB/AUSTN ST/MBTA

I93/US1 INTERCHANGE, Suffolk, MA

Built 2002 Load: 40.4 t ADT: 36,462

HWY RAMP U-A

Good

Over: HWY RAMP S-A

1.20 KM SE OF CALLAHAN TU, Suffolk, MA

Built 2001 Load: 40.5 t ADT: 13,000

ST 1 A/RP E-1ASB

Good

Over: COMB ST 1A NB & BLUE L

SEGMENT 3, Suffolk, MA

Built 2002 Load: 40.5 t

HWY RAMP K

Good

Over: OTHER RELIEF

BOSTON, MASS AVE. INT., Suffolk, MA

Built 2002 Load: 40.5 t ADT: 45,000

HWY ALBANY EXT

Good

Over: I 90 RAMP H

.25 KM N OF I90, Suffolk, MA

Built 2005 Load: 40.5 t ADT: 11,250

I 93 RAMP FX

Good

Over: OTHER RELIEF

I93/I90 INTERCHANGE, Suffolk, MA

Built 2004 Load: 40.9 t ADT: 1,333

I 93 HOV RAMP EB

Good

Over: OTHER RELIEF

.16 KM S OF I-90 EB, Suffolk, MA

Built 2002 Load: 40.9 t ADT: 10,000

I 93 RAMP X

Good

Over: HWY BROADWAY

I93/I90 INTERCHANGE, Suffolk, MA

Built 2004 Load: 41.0 t ADT: 2,546

US 1 NB/S ABT PR1

Good

Over: HWY ARLINGTON & 5TH ST

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

Built 1957 Load: 41.0 t ADT: 41,988

I 90 EB & RP1ANB

Good

Over: HWY SR-14

SEGMENT 1, Suffolk, MA

Built 2003 Load: 41.1 t

HWY SO STA OB RP

Good

Over: OTHER RELIEF

SOUTH STATION, Suffolk, MA

Built 1995 Load: 41.1 t

ST 1 A/SB

Good

Over: OTHER RELIEF

SEGMENT 2, Suffolk, MA

Built 1999 Load: 41.2 t ADT: 15,000

ST 1 A/SB

Good

Over: OTHER RELIEF

SEGMENT 1, Suffolk, MA

Built 1999 Load: 41.2 t ADT: 15,000

US 1 RAMP S-TB

Good

Over: OTHER RELIEF

I 93 US RT 1 INTERCHANG, Suffolk, MA

Built 2001 Load: 41.2 t ADT: 15,409

I 90 WB & RP1ASB

Good

Over: COMB SR-14 & BLUE LINE

SEGMENT 1, Suffolk, MA

Built 2002 Load: 41.4 t

I 93 RAMP NS

Good

Over: US 1 RAMP TC

I93/US1 INTERCHANGE, Suffolk, MA

Built 1999 Load: 41.5 t ADT: 19,945

I 93 HOV RAMP EB

Good

Over: OTHER RELIEF

0.5 MI S. OF I-90, Suffolk, MA

Built 2002 Load: 41.6 t ADT: 1,453

HWY SO STA CONN

Good

Over: HWY INFIELD ACCESS

.5 KM E OF I93, Suffolk, MA

Built 2003 Load: 42.0 t ADT: 3,100

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

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

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.