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)

I 93 RAMP KK

Fair

Over: OTHER RELIEF

.8 KM N OF I90, Suffolk, MA

Built 2003 Load: 54.4 t ADT: 2,416

US 20 N BEACON ST

Fair

Over: WATER CHARLES RIVER

.1 MI N OF I 90, Suffolk, MA

Built 1915 Load: 54.7 t ADT: 26,400

I 93 RAMPS SN NS

Fair

Over: RR BMRR BSG SPUR

I93/US1 INTERCHANGE, Suffolk, MA

Built 1999 Load: 55.6 t ADT: 37,301

ST 1 A/SB

Fair

Over: OTHER RELIEF

.3 MI NE OF CALLAHAN TUN, Suffolk, MA

Built 1951 Load: 56.0 t ADT: 43,707

ST 1 A/SB

Fair

Over: OTHER RELIEF

.48 KM N E OF CALLN TUN, Suffolk, MA

Built 1951 Load: 56.0 t ADT: 43,707

ST107 BROADWAY

Fair

Over: WATER DIAMOND CREEK

1.6 KM N OF ST 60, Suffolk, MA

Built 2011 Load: 56.1 t ADT: 33,103

HWY SQUIRE RD

Fair

Over: WATER PINES RIVER

0.5 KM WEST OF US-1, Suffolk, MA

Built 1950 Load: 56.4 t ADT: 10,800

HWY PARK DR

Fair

Over: TR GREEN LINE D

NEAR SEARS BLDG, Suffolk, MA

Built 1950 Load: 57.1 t ADT: 20,300

US 1 RAMP S-TB

Fair

Over: COMB RMP NS CT TL&MBTA

I93/US1 INTERCHANGE, Suffolk, MA

Built 2001 Load: 57.2 t ADT: 15,137

HWY CAMBRIDGE ST

Fair

Over: HWY SOLDIERS FIELD RD

.32 KM S OF WESTERN AVE, Suffolk, MA

Built 1954 Load: 57.6 t ADT: 36,466

I 93 RAMP SACN

Fair

Over: TR ORANGE LINE

I93/US1 INTERCHANGE, Suffolk, MA

Built 2005 Load: 57.6 t ADT: 19,624

HWY BOSTON ST

Fair

Over: I 93 /US1/ST3

2.4 KM S OF JCT I90&93, Suffolk, MA

Built 1958 Load: 57.7 t ADT: 18,620

I 93 /US1/ST3

Fair

Over: HWY VICTORY RD

6.6 KM S OF JCT I90&I93, Suffolk, MA

Built 1955 Load: 58.1 t ADT: 183,369

HWY RAMP 1A-D

Fair

Over: HWY RELIEF

1.20 KM SE OF CALLAHAN TU, Suffolk, MA

Built 2001 Load: 58.5 t ADT: 10,600

I 93 SB

Fair

Over: COMB AUSTIN ST &ORNG LN

I93/US1 INTERCHANGE, Suffolk, MA

Built 2003 Load: 59.3 t ADT: 55,751

US 1 RAMP CT

Fair

Over: COMB MBTA & MILLERS RIV

I93/US1 INTERCHANGE, Suffolk, MA

Built 2001 Load: 59.8 t ADT: 41,800

HWY COLUMBIA RD

Fair

Over: COMB OLD COLNY&MBTA&RED

1.6 KM E OF ST RTE 3, Suffolk, MA

Built 1956 Load: 60.1 t ADT: 82,500

I 93 RAMP X

Fair

Over: HWY W FOURTH ST

I93/I90 INTERCHANGE, Suffolk, MA

Built 2004 Load: 60.6 t ADT: 2,470

HWY NTHRLNDS RD

Fair

Over: WATER MUDDY RIVER

BROOKLINE LINE, Suffolk, MA

Built 1892 Load: 61.8 t ADT: 2,300

HWY FRONTAGE RD

Fair

Over: OTHER RELIEF

AT SO BOSTON BYPASS RD., Suffolk, MA

Built 1998 Load: 61.9 t ADT: 58,966

I 93 RAMP K

Fair

Over: COMB I90&I93RMP CC&AMTK

UNIT 1, Suffolk, MA

Built 2005 Load: 62.1 t ADT: 1,200

ST 1 A NB

Fair

Over: OTHER RELIEF

1.4 KM NE OF CALLAHAN, Suffolk, MA

Built 1951 Load: 62.5 t ADT: 27,823

HWY CEDAR ST

Fair

Over: COMB AMTRAK/MBTA & ORNG

S OF ROXBURY XING STATION, Suffolk, MA

Built 1981 Load: 63.8 t ADT: 9,257

HWY S BOS BPS RD

Fair

Over: I 93

MASS AVE. INT., Suffolk, MA

Built 1998 Load: 65.4 t ADT: 12,413

HWY FRONTAGE RD

Fair

Over: OTHER RELIEF

.5 M S OF I90 EB, Suffolk, MA

Built 2002 Load: 67.0 t ADT: 16,100

HWY S BOS BPS RD

Fair

Over: OTHER RELIEF

AT ACCESS RD., Suffolk, MA

Built 1998 Load: 67.1 t ADT: 13,200

HWY FRNT RD NB

Fair

Over: HWY RAMP K

MASS AVE. INT., Suffolk, MA

Built 2000 Load: 67.2 t ADT: 46,800

HWY BELGRADE AVE

Fair

Over: RR MBTA

JUST S OF HOLY NAME ROT, Suffolk, MA

Built 1918 Load: 67.7 t ADT: 14,600

HWY HEATH ST

Fair

Over: COMB AMTRAK/MBTA & ORNG

BTWN TERRACE & COLUMBUS, Suffolk, MA

Built 1981 Load: 68.0 t ADT: 15,250

HWY BOYLSTON ST

Fair

Over: COMB AMTRAK/MBTA & ORNG

AT STONY BROOK SUBSTATION, Suffolk, MA

Built 1981 Load: 68.4 t ADT: 3,500

HWY TRUMAN HWY

Fair

Over: WATER NEPONSET RIVER

.32 KM N OF NEPONST VL PK, Suffolk, MA

Built 1939 Load: 68.6 t ADT: 18,103

I 93 NB RAMP S-N

Fair

Over: HWY NASHUA ST

0.32 KM E OF LEVRTT CIR, Suffolk, MA

Built 2005 Load: 70.3 t ADT: 47,100

HWY WESTERN AVE

Fair

Over: WATER CHARLES RIVER

CITY LINE BOS CAMB, Suffolk, MA

Built 1924 Load: 71.4 t ADT: 26,100

I 93 RAMP AS

Fair

Over: OTHER RELIEF

UNIT 1, Suffolk, MA

Built 2003 Load: 72.0 t ADT: 26,120

HWY GORDON ST

Fair

Over: COMB AMTRAK/MBTA & ORNG

AT GREEN STREET STATION, Suffolk, MA

Built 1982 Load: 72.3 t ADT: 10,183

HWY RUGGLES ST

Fair

Over: COMB AMTRAK/MBTA & ORNG

AT RUGGLES STATION, Suffolk, MA

Built 1982 Load: 73.8 t ADT: 267

HWY ATHERTON ST

Fair

Over: COMB AMTRAK/MBTA & ORNG

N OF STONY BROOK SUBSTA, Suffolk, MA

Built 1980 Load: 73.9 t ADT: 3,500

HWY GREEN ST

Fair

Over: COMB AMTRAK/MBTA & ORNG

BTWN OAKDALE & WASHINGTON, Suffolk, MA

Built 1981 Load: 77.1 t ADT: 3,300

HWY PRENTISS ST

Fair

Over: COMB AMTRAK/MBTA & ORNG

1ST BR S OF RUGGLES ST, Suffolk, MA

Built 1981 Load: 79.4 t ADT: 5,450

HWY N HARVARD ST

Fair

Over: COMB CHARLES RV

.4 MI E OF WESTERN AVE, Suffolk, MA

Built 1912 Load: 79.8 t ADT: 24,100

HWY CENTRE ST

Fair

Over: COMB AMTRAK/MBTA & ORNG

BTWN TERRACE & COLUMBUS, Suffolk, MA

Built 1982 Load: 87.5 t ADT: 5,400

ST 28 BLUE HILL AV

Fair

Over: WATER NEPONSET RIVER

.48 KM S OF WOODHAVEN ST, Suffolk, MA

Built 1903 Load: 92.5 t ADT: 61,150

I 93 RAMP AS

Fair

Over: HWY BROADWAY

0.25KM SOUTH OF I-901170, Suffolk, MA

Built 2003 Load: 99.0 t ADT: 11,120

HWY FAIRMOUNT AV

Fair

Over: WATER NEPONSET RIVER

JUST NW OF TRUMAN HWY, Suffolk, MA

Built 1907 Load: 99.9 t ADT: 16,600

ST109 SPRING ST

Fair

Over: WATER CHARLES RIVER

@ DEDHAM TL = D05006, Suffolk, MA

Built 1861 Load: 99.9 t ADT: 31,422

I 90

Fair

Over: HWY SERVICE RD

AT RAILROAD YARDS S110, Suffolk, MA

Built 1965 Load: 99.9 t ADT: 109,536

I 90

Fair

Over: OTHER RELIEF

AT RAILROAD YARDS S102, Suffolk, MA

Built 1964 Load: 99.9 t ADT: 109,536

I 93 SB

Fair

Over: HWY ALBANY ST

MASS AVE. INT., Suffolk, MA

Built 1997 Load: 99.9 t ADT: 164,570

HWY PARK ST

Good

Over: RR MBTA

1.9 KM NE OF JCTSR109&RT1, Suffolk, MA

Built 1900 Load: 15.4 t ADT: 3,362

ST 28 LEVERETT CIR

Good

Over: HWY EMBANKMENT RD WB

.16 KM N OF BLOSSOM ST, Suffolk, MA

Built 1952 Load: 19.4 t ADT: 61,034

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

Related

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