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)

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.

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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.