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)

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.

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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.