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)

ST 2 A/MASS AVE

Good

Over: ST 2 COMMONWEALTH AVE

JUST S CHARLES RIV, Suffolk, MA

Built 1937 Load: 42.1 t ADT: 14,482

HWY FRONTAGE RD

Good

Over: COMB I90 RPS&HOV&AMTK

.5 MI S I-90 EB, Suffolk, MA

Built 2002 Load: 42.1 t ADT: 4,534

ST 1 A/& RP E-1AN

Good

Over: I 90 EB

SEGMENT 1, Suffolk, MA

Built 2002 Load: 42.3 t

I 90 EB & RP1ANB

Good

Over: COMB ST 1A NB & BLUE L

SEGMENT 2, Suffolk, MA

Built 2002 Load: 42.3 t

I 93 RAMP SN

Good

Over: US 1 RAMP TC

I93/US1 INTERCHANGE, Suffolk, MA

Built 1999 Load: 42.3 t ADT: 32,800

HWY RAMP K

Good

Over: OTHER RELIEF

MASS AVE. INT., Suffolk, MA

Built 2002 Load: 42.4 t ADT: 27,414

ST 1 A/RP 1ANB

Good

Over: COMB SR 14 & BLUE L

SEGMENT 1, Suffolk, MA

Built 2005 Load: 42.8 t

I 93 RAMP SN

Good

Over: TR MBTA ORANGE LINE

I93 US1 INTERCHANGE, Suffolk, MA

Built 1999 Load: 42.9 t ADT: 19,452

I 90 RAMP D

Good

Over: OTHER GARAGE RAMP

EXIT 22 TOWARD STUART ST., Suffolk, MA

Built 1981 Load: 43.4 t ADT: 9,569

HWY RAMP K

Good

Over: OTHER RELIEF

MASS AVE. INT., Suffolk, MA

Built 2002 Load: 43.8 t ADT: 45,000

HWY HYDE PARK AV

Good

Over: WATER MOTHER BROOK

.48 KM S OF CLEARY SQ, Suffolk, MA

Built 1991 Load: 44.6 t ADT: 16,600

ST 1 A/RP E-1ASB

Good

Over: I 90 WB & SR-14

SEGMENT 2, Suffolk, MA

Built 2002 Load: 44.8 t

I 93 RAMP X

Good

Over: I 90 & RAMPS CC & KK

I93/I90 INTERCHANGE, Suffolk, MA

Built 2004 Load: 44.8 t ADT: 2,066

HWY RIVER ST

Good

Over: WATER MOTHER BROOK

.16 KM W OF KNIGHT ST, Suffolk, MA

Built 1976 Load: 45.0 t ADT: 17,198

I 90 WB

Good

Over: ST 1 A/NB & RP1ANB

SEGMENT 2, Suffolk, MA

Built 1999 Load: 45.0 t ADT: 50,431

HWY SO STA BUSWY

Good

Over: COMB MBTA & RELIEF

SOUTH STATION, Suffolk, MA

Built 1995 Load: 45.0 t

HWY MORTON ST

Good

Over: RR MBTA

.8KM SW OF JCTSR28&SR203, Suffolk, MA

Built 2015 Load: 45.4 t ADT: 40,862

I 90 RAMP Q & ALB

Good

Over: I 90 RAMP H

0.3 KM NORTH OF I 90, Suffolk, MA

Built 2005 Load: 46.0 t ADT: 11,250

HWY ACCESS BRG B

Good

Over: I 93 RAMP KK

.15K W OF I93NB@S.STA CON, Suffolk, MA

Built 2003 Load: 46.0 t ADT: 600

I 93 RAMP SN

Good

Over: US 1 RAMP CT

I93/US1 INTERCHANGE, Suffolk, MA

Built 1999 Load: 46.4 t ADT: 32,800

HWY AMER LEG HWY

Good

Over: ST203 MORTON ST

5.3 KM W OF RT 93, Suffolk, MA

Built 2012 Load: 46.7 t ADT: 38,100

US 1 RAMP CT

Good

Over: OTHER RELIEF

I93/US1 INTERCHANGE, Suffolk, MA

Built 2001 Load: 46.8 t ADT: 42,552

HWY W NEWTON ST

Good

Over: TR ORANGE LINE

BOSTON, Suffolk, MA

Built 1932 Load: 46.9 t ADT: 24,209

I 93 RAMPS NS SN

Good

Over: OTHER RELIEF

I93 RAMPS N-S S-N, Suffolk, MA

Built 1999 Load: 47.4 t ADT: 20,161

HWY MORRSSEY BLV

Good

Over: HWY MT VERNON ST

.16 KM W OF I 93, Suffolk, MA

Built 1925 Load: 47.5 t ADT: 41,500

HWY BABSON ST

Good

Over: RR MBTA

1.2 KM NE OFJCTSR28&SR138, Suffolk, MA

Built 1901 Load: 47.7 t ADT: 10,474

HWY ACCES BRG A

Good

Over: I 93 RAMPS CC & D

.15 K W OF I93@SO.STA CON, Suffolk, MA

Built 2004 Load: 48.3 t ADT: 129

I 93 RAMP N-S

Good

Over: COMB MGH PKNG & MBTA

LEVERETT CIR-UNIT 2, Suffolk, MA

Built 1999 Load: 48.4 t ADT: 51,982

HWY RIVER ST

Good

Over: RR MBTA

30 M W. OF THORN ST, Suffolk, MA

Built 2012 Load: 48.6 t ADT: 13,319

US 1 RAMP TC

Good

Over: OTHER RELIEF

I93/US1 INTERCHANGE, Suffolk, MA

Built 2002 Load: 48.6 t ADT: 60,300

HWY SO STA IB RP

Good

Over: RR MBTA

SOUTH STATION, Suffolk, MA

Built 1995 Load: 48.6 t

I 93 RAMP MW

Good

Over: COMB HOV EB & MBTA WYE

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

Built 2001 Load: 48.8 t ADT: 1,052

I 90 WB & RP1ASB

Good

Over: OTHER RELIEF

SEGMENT 3, Suffolk, MA

Built 1999 Load: 49.5 t ADT: 60,129

US 1

Good

Over: HWY SPRUCE ST

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

Built 1957 Load: 49.5 t ADT: 83,976

US 1 SB RAMP

Good

Over: HWY ORANGE ST

.8 MI N OF TOBIN BR., Suffolk, MA

Built 1956 Load: 50.0 t ADT: 9,143

I 93 RAMP S-N

Good

Over: RR MBTA

LEVERETT CIR-UNIT 2, Suffolk, MA

Built 1999 Load: 50.2 t ADT: 42,672

I 93 RAMPS SN NS

Good

Over: RR MBTA BSG SPUR

I93/US1 INTERCHANGE, Suffolk, MA

Built 1999 Load: 50.4 t ADT: 38,735

US 1 RAMP CT

Good

Over: OTHER RELIEF

I93/US1 INTERCHANGE, Suffolk, MA

Built 2001 Load: 51.5 t ADT: 27,143

I 93 RAMP SN

Good

Over: US 1 RAMP TC & LC

I93/US1 INTERCHANGE, Suffolk, MA

Built 1999 Load: 51.8 t ADT: 38,009

I 93 RAMP X

Good

Over: I 90 & RAMP CC

I93/I90 INTERCHANGE, Suffolk, MA

Built 2004 Load: 51.8 t ADT: 1,939

I 93 RAMP X

Good

Over: COMB RELIEF

I93/I90 INTERCHANGE, Suffolk, MA

Built 2004 Load: 51.8 t ADT: 2,066

I 93 RAMP K

Good

Over: OTHER RELIEF

I-93/I-90 INTERCHANGE, Suffolk, MA

Built 2004 Load: 51.8 t ADT: 8,793

HWY REVERE ST

Good

Over: RR MBTA/BMRR

1.3 KM N JCT SR1A&60, Suffolk, MA

Built 2008 Load: 52.2 t ADT: 11,000

I 93 RAMP N-S

Good

Over: I 93 RAMP LC-S TUNNEL

LEVERETT CIR-UNIT 1, Suffolk, MA

Built 1999 Load: 52.6 t ADT: 34,304

I 93 RAMP LC-N

Good

Over: HWY NASHUA ST

LEVERETT CIRCLE BOSTON, Suffolk, MA

Built 2005 Load: 53.9 t ADT: 17,100

HWY IPSWICH ST

Good

Over: WATER MUDDY RIVER

NEXT TO MASS PIKE, Suffolk, MA

Built 1898 Load: 54.0 t ADT: 10,862

US 1 NE XWAY

Good

Over: HWY ORANGE & CARTER ST

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

Built 1956 Load: 54.0 t ADT: 137,500

HWY SPRAGUE ST

Good

Over: COMB MBTA & ACCESS RD

.40 KM E. OF WOLCOTT SQ., Suffolk, MA

Built 1899 Load: 54.4 t ADT: 13,700

US 1 RAMP TC

Good

Over: OTHER RELIEF

I93/US1 INTERCHANGE, Suffolk, MA

Built 2002 Load: 56.5 t ADT: 60,300

I 93 RAMP XX

Good

Over: COMB I90&I93RMP CC&AMTK

I93 / I90 INTERCHANGE, Suffolk, MA

Built 2005 Load: 56.5 t ADT: 480

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.