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)

HWY SOUTHMPTN ST

Fair

Over: I 93 /US1/ST3

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

Built 1958 Load: 37.7 t ADT: 29,741

ST 1 A/OFF RAMP

Fair

Over: OTHER RELIEF

.8 MI NE OF CALLAHAN TUN., Suffolk, MA

Built 1951 Load: 37.8 t ADT: 12,413

HWY MYSTIC AVE

Fair

Over: COMB ORANGE & MBTA/BMRR

610 M NW OF SULLIVAN SQ, Suffolk, MA

Built 1953 Load: 37.9 t ADT: 31,293

HWY FRNT RD NB

Fair

Over: OTHER RELIEF

MASS AVE. INT., Suffolk, MA

Built 2000 Load: 38.0 t ADT: 42,672

US 1 NE XWAY

Fair

Over: US 1 RAMP & ST60

1 MI W OF ST-107, Suffolk, MA

Built 1956 Load: 38.0 t ADT: 71,684

HWY MILTON ST

Fair

Over: RR AMTRAK/MBTA

182 M NW OF WOLCOTT SQ., Suffolk, MA

Built 1919 Load: 38.1 t ADT: 42,700

HWY QUINCY SHORE

Fair

Over: OTHER PARKING

.2 MI E OF I 93, Suffolk, MA

Built 1970 Load: 38.2 t ADT: 1,200

HWY ARSENAL ST

Fair

Over: WATER CHARLES RIVER

CITY LINE WAT BOS, Suffolk, MA

Built 1925 Load: 38.3 t ADT: 34,009

ST 1 A/N SHORE RD

Fair

Over: ST 1 A/RAMP A&B

4.8 KM NE JCT SR 60&SR1A, Suffolk, MA

Built 1972 Load: 38.4 t ADT: 34,800

HWY MASS AVE

Fair

Over: COMB AMTRAK/MBTA & ORNG

ADJ. TO MASS AVE STATION, Suffolk, MA

Built 1980 Load: 38.5 t ADT: 15,000

HWY BAKER ST

Fair

Over: RR MBTA/CSX

.8 KM NE OF JCT SR109&RT1, Suffolk, MA

Built 1906 Load: 38.5 t ADT: 10,862

HWY W FIFTH ST

Fair

Over: COMB HAUL RD & MBTA RED

1371 M SW OF D ST OFFICE, Suffolk, MA

Built 1918 Load: 38.6 t ADT: 1,939

ST 1 A/LEE BRBNK

Fair

Over: OTHER OIL PIPE TUNNEL

1 MI SW OF JET SR 145&1A, Suffolk, MA

Built 1934 Load: 38.6 t ADT: 58,700

ST 1 A/LEE BRBNK

Fair

Over: OTHER OIL PIPE TUNNEL

1 MI S OF ST-145, Suffolk, MA

Built 1933 Load: 38.6 t ADT: 60,846

ST 1 A/LEE BRBNK

Fair

Over: OTHER OIL PIPE TUNNEL

1 MI SW OF JET SR 145&1A, Suffolk, MA

Built 1933 Load: 38.6 t ADT: 58,700

HWY WEST ST

Fair

Over: RR AMTRAK/MBTA

.53 KM N OF CLEARY SQ., Suffolk, MA

Built 1986 Load: 38.7 t ADT: 27,155

HWY CENTRE ST

Fair

Over: RR MBTA

1.6 KM NE JCT SR109&RT1, Suffolk, MA

Built 1888 Load: 38.8 t ADT: 27,000

ST 1 A/SB

Fair

Over: OTHER RELIEF & PED WALKW

.16 KM N OF CALLAHAN TUN, Suffolk, MA

Built 1951 Load: 38.8 t ADT: 43,707

HWY VIADUCT ST

Fair

Over: HWY NORTHERN AVE

AT WORLD TRADE CENTER, Suffolk, MA

Built 1915 Load: 39.0 t ADT: 700

ST 1 A/NB

Fair

Over: OTHER RELIEF

2000 FT NE CALLAHAN TUN, Suffolk, MA

Built 1951 Load: 39.1 t ADT: 27,823

HWY MORRSSEY BLV

Fair

Over: WATER PATTENS COVE

.48 KM W OF U OF MASS, Suffolk, MA

Built 1973 Load: 39.2 t ADT: 81,700

I 93 SB

Fair

Over: OTHER PARKING AREA

UNIT 3, Suffolk, MA

Built 2000 Load: 39.2 t ADT: 148,110

HWY ALBANY ST

Fair

Over: COMB I90 & AMTRAK

WEST OF I93 SB OVER I90, Suffolk, MA

Built 2005 Load: 39.2 t ADT: 15,300

I 93 /US1/ST3

Fair

Over: HWY HALLET STREET

4.8 MI S OF JCTI90&I93, Suffolk, MA

Built 1956 Load: 39.3 t ADT: 190,508

ST 3 CAMBRIDGE ST

Fair

Over: COMB ST3/ST28 & CHARLES

.2 MI W OF BLOSSOM ST, Suffolk, MA

Built 1905 Load: 39.4 t ADT: 29,100

I 93 & RMP SA-CN

Fair

Over: WATER CHARLES RIV/RAMPS

N OF TD GARDEN, Suffolk, MA

Built 2002 Load: 39.5 t ADT: 155,200

HWY GARDNER ST

Fair

Over: RR MBTA

.8 KM NW OF JCTSR109&RT1, Suffolk, MA

Built 1906 Load: 39.6 t ADT: 1,400

HWY MASS AVE

Fair

Over: I 93

MASS AVE. INT., Suffolk, MA

Built 2000 Load: 39.7 t ADT: 40,100

I 93 NB

Fair

Over: HWY FRONTAGE RD NB

ALBANY ST AND FRONTAGE RD, Suffolk, MA

Built 2002 Load: 39.9 t ADT: 127,241

US 1 NE XWAY

Fair

Over: HWY HYSIL AVE

.4 MI NW OF JCT SR16&US1, Suffolk, MA

Built 1956 Load: 39.9 t ADT: 66,200

I 93 SB

Fair

Over: OTHER RELIEF

I93, Suffolk, MA

Built 2000 Load: 40.1 t ADT: 108,879

HWY BOSTON ST

Fair

Over: TR AMTRAK & RED LINE

.04 M.OF I93, Suffolk, MA

Built 1977 Load: 40.3 t ADT: 15,300

HWY DORCHSTR AVE

Fair

Over: I 93 /US1/ST3

2.4 KM SE OF JET I93&I90, Suffolk, MA

Built 1957 Load: 40.3 t ADT: 10,991

HWY BLAKEMORE ST

Fair

Over: RR AMTRAK/MBTA

3.8 W OF RT 93, Suffolk, MA

Built 1882 Load: 40.4 t ADT: 2,200

I 93 SB ON RAMP

Fair

Over: OTHER RELIEF

2 MI S OF JCT I90&I93, Suffolk, MA

Built 1958 Load: 40.4 t ADT: 15,647

I 90 WB

Fair

Over: US 20 N BEACON ST

.2 MI S. CHARLES RV S39, Suffolk, MA

Built 1964 Load: 40.5 t ADT: 43,643

HWY RAMP T-A

Fair

Over: HWY RAMP S-A

1.20 KM SE OF CALLAHAN TU, Suffolk, MA

Built 2001 Load: 40.5 t ADT: 7,500

HWY RAMP T-D

Fair

Over: HWY RELIEF

1.20 KM SE OF CALLAHAN TU, Suffolk, MA

Built 2001 Load: 40.5 t ADT: 6,900

HWY RAMP T-D

Fair

Over: HWY RAMP T/U-A/S-A

1.20 KM SE OF CALLAHAN TU, Suffolk, MA

Built 2001 Load: 40.5 t ADT: 69,000

HWY RAMP T-D

Fair

Over: HWY RAMP S-A

1.20 KM SE OF CALLAHAN TU, Suffolk, MA

Built 2001 Load: 40.5 t ADT: 69,000

HWY RAMP 1A/D

Fair

Over: I 90 RAMP T-A/D HOTEL D

1.20 KM SE OF CALLAHAN TU, Suffolk, MA

Built 2001 Load: 40.5 t ADT: 10,600

HWY RAMP E-T

Fair

Over: HWY RAMP S-A

1.20 KM SE OF CALLAHAN TU, Suffolk, MA

Built 1996 Load: 40.5 t ADT: 13,360

HWY RAMP E-T

Fair

Over: HWY RAMP 1A A/D

1.20 KM SE OF CALLAHAN TU, Suffolk, MA

Built 1996 Load: 40.5 t ADT: 13,360

HWY RAMP E-T

Fair

Over: HWY ACCESS ROAD

1.20 KM SE OF CALLAHAN TU, Suffolk, MA

Built 1996 Load: 40.5 t ADT: 13,360

HWY RAMP U-A/D

Fair

Over: HWY RAMP 1A-A/D

1.20 KM SE OF CALLAHAN TU, Suffolk, MA

Built 2001 Load: 40.5 t ADT: 22,300

HWY RAMP U-D

Fair

Over: HWY RAMP T-U-A

1.20 KM SE OF CALLAHAN TU, Suffolk, MA

Built 2001 Load: 40.5 t ADT: 9,400

HWY RAMP U-D

Fair

Over: HWY RELIEF

1.20 KM SE OF CALLAHAN TU, Suffolk, MA

Built 2001 Load: 40.5 t ADT: 9,400

I 93 NB

Fair

Over: HWY BROADWAY

.2 M N OF I90 EB, Suffolk, MA

Built 2002 Load: 40.5 t ADT: 127,241

I 93 NB

Fair

Over: HWY W FOURTH ST

B16661B UNIT 1, Suffolk, MA

Built 2002 Load: 40.5 t ADT: 82,300

US 1 NE XWAY

Fair

Over: HWY WEBSTER AVE

.64 KM SW OF JCT SR16&US1, Suffolk, MA

Built 1956 Load: 40.5 t ADT: 91,000

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