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)

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 U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial