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 RAMPS NS SN

Fair

Over: OTHER RELIEF

I93 RAMPS N-S S-N, Suffolk, MA

Built 1999 Load: 46.3 t ADT: 20,161

HWY S BOS BYPASS

Fair

Over: HWY WYDETT CIR ACC RD

0.6 M S OF JCT I 90, I 93, Suffolk, MA

Built 1995 Load: 46.3 t ADT: 12,300

I 93 SB

Fair

Over: HWY TRAVELER ST & PARK

UNIT 2, Suffolk, MA

Built 2000 Load: 46.4 t ADT: 148,110

I 93 SB

Fair

Over: COMB MILLERS RIVER/ OTH

I93/US 1 INTERCHANGE, Suffolk, MA

Built 2002 Load: 46.8 t ADT: 80,170

HWY RICHMOND ST

Fair

Over: ST 1 A/NB

AT WEST END CAL TNL, Suffolk, MA

Built 1961 Load: 46.9 t ADT: 775

ST 2 A/MASS AVE

Fair

Over: COMB STRW DR & CHAS RIV

.8 MI E OF BU BRIDGE, Suffolk, MA

Built 1891 Load: 47.0 t ADT: 38,638

ST 1 A/RP E-1AS

Fair

Over: ST 1 A/& RP E-1ANB

SEGMENT 1, Suffolk, MA

Built 2003 Load: 47.1 t

HWY SARATOGA ST

Fair

Over: TR BLUE LINE

OVER BLUE LINE, Suffolk, MA

Built 1913 Load: 47.2 t ADT: 34,400

I 93 RAMP K

Fair

Over: HWY W FOURTH ST

0.5 M S. OF I90, Suffolk, MA

Built 2002 Load: 47.2 t ADT: 11,717

I 93 RAMP X

Fair

Over: OTHER RELIEF

I93/I90 INTERCHANGE, Suffolk, MA

Built 2004 Load: 47.4 t ADT: 1,221

I 93 NB

Fair

Over: I 93 SB

I93/US1 INTERCHANGE, Suffolk, MA

Built 2003 Load: 47.5 t ADT: 70,395

I 93 RAMP SA-CN

Fair

Over: I 93 RAMPS

NORTH BANK CHARLES RIVER, Suffolk, MA

Built 2004 Load: 47.5 t ADT: 20,359

I 93 RAMP NS

Fair

Over: US 1 RAMP TC & LC

I93/US1 INTERCHANGE, Suffolk, MA

Built 1999 Load: 47.5 t ADT: 20,547

HWY RAMP 1A/D

Fair

Over: HWY RAMP 1A-A

1.20 KM SE OF CALLAHAN TU, Suffolk, MA

Built 2001 Load: 47.7 t ADT: 10,600

HWY ACCESS RD

Fair

Over: WATER MILL CREEK

IN CHELSEA, Suffolk, MA

Built 1993 Load: 47.7 t ADT: 4,000

HWY W BROADWAY

Fair

Over: COMB HAUL RD & MBTA RED

1.1 KM SW OF D ST, Suffolk, MA

Built 1918 Load: 47.8 t ADT: 18,103

I 93 RAMP NS

Fair

Over: RR MBTA

I93 US1 INTERCHANGE, Suffolk, MA

Built 1999 Load: 47.8 t ADT: 31,000

US 1 RAMP TC

Fair

Over: COMB I93 RMP NS & MBTA

I93/US1 INTERCHANGE, Suffolk, MA

Built 2002 Load: 47.9 t ADT: 51,207

I 93 RAMP MW

Fair

Over: COMB I90&RMP LL KK&AMTK

.5 M N OF I90, Suffolk, MA

Built 2002 Load: 48.0 t ADT: 2,521

US 1 RAMP CT

Fair

Over: OTHER RELIEF

US1 RAMP C-T, Suffolk, MA

Built 2001 Load: 48.1 t ADT: 46,604

I 93 SB

Fair

Over: COMB RAMP LT& MILLERS R

I93/US INTERCHANGE, Suffolk, MA

Built 2002 Load: 48.6 t ADT: 97,000

I 93 RAMP K

Fair

Over: HWY RAMP MW & HOV EB

0.5 MI S. OF I-90, Suffolk, MA

Built 2002 Load: 49.0 t ADT: 11,583

I 93 HOV RAMP EB

Fair

Over: RR AMTRAK

0.8 KM S. OF I-90 EB, Suffolk, MA

Built 2002 Load: 49.0 t ADT: 2,316

I 93 RAMP KK

Fair

Over: HWY HOV RAMP EB

0.5 MI S. OF I-90, Suffolk, MA

Built 2002 Load: 49.0 t ADT: 16,461

US 1 NE XWAY

Fair

Over: RR MBTA & SILVER LINE

1 M NE OF TOBIN BR., Suffolk, MA

Built 1957 Load: 49.2 t ADT: 83,976

US 1 CUTLER HWY

Fair

Over: COMB TRAIL & LINDEN CRK

.64 KM N OF ST-60, Suffolk, MA

Built 1937 Load: 49.2 t ADT: 114,000

HWY RAMP T-A/D

Fair

Over: HWY RELIEF

1.20 KM SE OF CALLAHAN TU, Suffolk, MA

Built 2001 Load: 49.5 t ADT: 14,400

ST 28 CHAS R DM RD

Fair

Over: WATER CHARLES RIVER

.1 MI NW OF NASHUA ST, Suffolk, MA

Built 1910 Load: 49.7 t ADT: 28,500

I 93 SB

Fair

Over: COMB I90 & AMTRAK

UNIT 4, Suffolk, MA

Built 2000 Load: 49.7 t ADT: 116,881

I 93 RAMP NS

Fair

Over: RR MBTA

I93/US1 INTERCHANGE, Suffolk, MA

Built 1999 Load: 49.9 t ADT: 19,352

I 93 NB RAMP C-L

Fair

Over: OTHER RELIEF

RAMP N. OF GILMORE BRIDGE, Suffolk, MA

Built 1999 Load: 50.0 t ADT: 17,800

I 93 NB RAMP CL

Fair

Over: OTHER RELIEF

RAMP N. OF GILMORE BRIDGE, Suffolk, MA

Built 1999 Load: 50.0 t ADT: 17,800

ST 1 A/VFW PKWY

Fair

Over: RR MBTA/BMRR

.32 KM N JCT SR1A&145, Suffolk, MA

Built 1932 Load: 50.0 t ADT: 47,457

HWY SEAPORT BLVD

Fair

Over: WATER FORT POINT CHANNEL

0.1MI EAST ATLANTIC AVE., Suffolk, MA

Built 1996 Load: 50.2 t ADT: 22,000

I 93 RAMPS SN NS

Fair

Over: RR MBTA

I93 US1 INTERCHANGE, Suffolk, MA

Built 1999 Load: 50.2 t ADT: 19,805

HWY S BOS BPS RD

Fair

Over: OTHER RELIEF

AT NB FRONTAGE RD., Suffolk, MA

Built 1998 Load: 50.2 t ADT: 16,600

HWY SUMNER ST

Fair

Over: OTHER PEDESTRIAN WLKWY

E. OF BREMEN/SUMNER INT., Suffolk, MA

Built 1908 Load: 50.3 t ADT: 7,241

HWY RAMP 1A-D

Fair

Over: HWY ARRIVAL ROADWAY

1.2 K SE OF CALLAHAN TU, Suffolk, MA

Built 2001 Load: 50.4 t ADT: 10,600

HWY MEDWAY ST

Fair

Over: TR RED HSL

0.1 MI S OF ADAMS ST, Suffolk, MA

Built 1928 Load: 50.7 t ADT: 800

I 93 RAMP E-SS

Fair

Over: I 93 RAMP C

0.25 MI E OF I-93, Suffolk, MA

Built 2002 Load: 50.8 t ADT: 517

ST 3 A/HNCK OFFRP

Fair

Over: OTHER RELIEF

.2 MI E OF I 93, Suffolk, MA

Built 1970 Load: 50.9 t ADT: 21,200

ST 3 A/HANCK ONRP

Fair

Over: OTHER RELIEF

.2 MI E OF I 93, Suffolk, MA

Built 1970 Load: 50.9 t ADT: 16,500

I 93 RAMP K

Fair

Over: I 90 & I 93 RAMP KK

I-90/I-93 INTERCHANGE, Suffolk, MA

Built 2006 Load: 50.9 t ADT: 9,310

US 1 RAMP CT

Fair

Over: COMB I93 SB &RMPS& MBTA

I93/US1 INTERCHANGE, Suffolk, MA

Built 2001 Load: 51.5 t ADT: 26,663

HWY JAMAICAWAY

Fair

Over: ST 9 HUNTNGTON AVE

JCT US 1 & ST 9, Suffolk, MA

Built 1936 Load: 52.1 t ADT: 42,700

I 93 RAMP KK

Fair

Over: COMB I90&RMP LL KK&AMTK

.5 MI N OF I90, Suffolk, MA

Built 2003 Load: 52.2 t ADT: 980

I 90 RAMP B & D

Fair

Over: HWY SERVICE ROAD

EXIT 22 NEAR TOP RP SPLIT, Suffolk, MA

Built 1981 Load: 52.5 t ADT: 16,034

I 93 NB RAMP CL

Fair

Over: OTHER RELIEF

RAMP N. OF GILMORE BRIDGE, Suffolk, MA

Built 1999 Load: 53.0 t ADT: 17,800

I 93 RAMPS SN NS

Fair

Over: RR BMRR BSG SPUR

I93/US1 INTERCHANGE, Suffolk, MA

Built 1999 Load: 53.2 t ADT: 37,301

I 93 HOV RAMP EB

Fair

Over: I 93 RAMP XX

0.8 KM S. OF I-90, Suffolk, MA

Built 2002 Load: 53.7 t ADT: 6,100

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.